Gases
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
Chromatography, High Pressure Liquid
Chromatography, Gas
Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.
Chromatography, Affinity
Chromatography, Gel
Chromatography
Techniques used to separate mixtures of substances based on differences in the relative affinities of the substances for mobile and stationary phases. A mobile phase (fluid or gas) passes through a column containing a stationary phase of porous solid or liquid coated on a solid support. Usage is both analytical for small amounts and preparative for bulk amounts.
Chromatography, Ion Exchange
Chromatography, Thin Layer
Gas Chromatography-Mass Spectrometry
Chromatography, DEAE-Cellulose
Electrophoresis, Polyacrylamide Gel
Chromatography, Agarose
Pulmonary Gas Exchange
Mass Spectrometry
Noble Gases
Molecular Sequence Data
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Chromatography, Reverse-Phase
Amino Acid Sequence
Amino Acids
Chromatography, Paper
Hydrogen-Ion Concentration
Gas, Natural
A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Substrate Specificity
Spectrophotometry, Ultraviolet
Chemistry
Cattle
Tandem Mass Spectrometry
A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection.
Chemical Phenomena
Spectrometry, Mass, Electrospray Ionization
A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry.
Carbohydrates
Gas Gangrene
A severe condition resulting from bacteria invading healthy muscle from adjacent traumatized muscle or soft tissue. The infection originates in a wound contaminated with bacteria of the genus CLOSTRIDIUM. C. perfringens accounts for the majority of cases (over eighty percent), while C. noyvi, C. septicum, and C. histolyticum cause most of the other cases.
Chemical Fractionation
Isoelectric Focusing
Countercurrent Distribution
Oil and Gas Fields
Chromatography, Micellar Electrokinetic Capillary
Carbohydrate Sequence
Escherichia coli
A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.
Magnetic Resonance Spectroscopy
Oligosaccharides
Temperature
Calibration
Rabbits
Isoelectric Point
Peptide Fragments
Liver
Indicators and Reagents
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)
Reference Standards
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Protein Binding
Solubility
Trypsin
Macromolecular Substances
Flame Ionization
Carbon Dioxide
Microchemistry
Fatty Acids
Immunodiffusion
Peptides
Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.
Base Sequence
Hydroxyapatites
A group of compounds with the general formula M10(PO4)6(OH)2, where M is barium, strontium, or calcium. The compounds are the principal mineral in phosphorite deposits, biological tissue, human bones, and teeth. They are also used as an anticaking agent and polymer catalysts. (Grant & Hackh's Chemical Dictionary, 5th ed)
Glycoproteins
Mustard Gas
Severe irritant and vesicant of skin, eyes, and lungs. It may cause blindness and lethal lung edema and was formerly used as a war gas. The substance has been proposed as a cytostatic and for treatment of psoriasis. It has been listed as a known carcinogen in the Fourth Annual Report on Carcinogens (NTP-85-002, 1985) (Merck, 11th ed).
Stereoisomerism
Cloning, Molecular
Solid Phase Extraction
Radioimmunoassay
Classic quantitative assay for detection of antigen-antibody reactions using a radioactively labeled substance (radioligand) either directly or indirectly to measure the binding of the unlabeled substance to a specific antibody or other receptor system. Non-immunogenic substances (e.g., haptens) can be measured if coupled to larger carrier proteins (e.g., bovine gamma-globulin or human serum albumin) capable of inducing antibody formation.
Molecular Structure
Swine
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis.
Limit of Detection
Binding Sites
Solvents
Biological Assay
A method of measuring the effects of a biologically active substance using an intermediate in vivo or in vitro tissue or cell model under controlled conditions. It includes virulence studies in animal fetuses in utero, mouse convulsion bioassay of insulin, quantitation of tumor-initiator systems in mouse skin, calculation of potentiating effects of a hormonal factor in an isolated strip of contracting stomach muscle, etc.
Oxygen
Methanol
Sensitivity and Specificity
Species Specificity
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
Helium
Helium. A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. (Dorland, 27th ed)
Chemical Precipitation
Plant Extracts
Lectins
Proteins that share the common characteristic of binding to carbohydrates. Some ANTIBODIES and carbohydrate-metabolizing proteins (ENZYMES) also bind to carbohydrates, however they are not considered lectins. PLANT LECTINS are carbohydrate-binding proteins that have been primarily identified by their hemagglutinating activity (HEMAGGLUTININS). However, a variety of lectins occur in animal species where they serve diverse array of functions through specific carbohydrate recognition.
Brain Chemistry
Isoenzymes
Oxidation-Reduction
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).
Anion Exchange Resins
Isomerism
Proteins
Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.
Volatilization
Centrifugation, Density Gradient
Carrier Proteins
Rats, Inbred Strains
Sequence Homology, Amino Acid
Chemistry Techniques, Analytical
Spectrometry, Mass, Fast Atom Bombardment
A mass spectrometric technique that is used for the analysis of a wide range of biomolecules, such as glycoalkaloids, glycoproteins, polysaccharides, and peptides. Positive and negative fast atom bombardment spectra are recorded on a mass spectrometer fitted with an atom gun with xenon as the customary beam. The mass spectra obtained contain molecular weight recognition as well as sequence information.
Glycopeptides
Phospholipids
Lipids containing one or more phosphate groups, particularly those derived from either glycerol (phosphoglycerides see GLYCEROPHOSPHOLIPIDS) or sphingosine (SPHINGOLIPIDS). They are polar lipids that are of great importance for the structure and function of cell membranes and are the most abundant of membrane lipids, although not stored in large amounts in the system.
Biotransformation
The chemical alteration of an exogenous substance by or in a biological system. The alteration may inactivate the compound or it may result in the production of an active metabolite of an inactive parent compound. The alterations may be divided into METABOLIC DETOXICATION, PHASE I and METABOLIC DETOXICATION, PHASE II.
Glycolipids
Peptide Mapping
Analysis of PEPTIDES that are generated from the digestion or fragmentation of a protein or mixture of PROTEINS, by ELECTROPHORESIS; CHROMATOGRAPHY; or MASS SPECTROMETRY. The resulting peptide fingerprints are analyzed for a variety of purposes including the identification of the proteins in a sample, GENETIC POLYMORPHISMS, patterns of gene expression, and patterns diagnostic for diseases.
Fermentation
Chromatography, Supercritical Fluid
Physicochemical Phenomena
Chemistry, Physical
Solid Phase Microextraction
Streptococcus pyogenes
Ultracentrifugation
Spectrophotometry
Substance Abuse Detection
Electrophoresis
Pesticide Residues
Enzyme Stability
Detergents
Volatile Organic Compounds
Durapatite
Culture Media
Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.
Trifluoroacetic Acid
Glycosylation
Blood Proteins
Glycosides
Any compound that contains a constituent sugar, in which the hydroxyl group attached to the first carbon is substituted by an alcoholic, phenolic, or other group. They are named specifically for the sugar contained, such as glucoside (glucose), pentoside (pentose), fructoside (fructose), etc. Upon hydrolysis, a sugar and nonsugar component (aglycone) are formed. (From Dorland, 28th ed; From Miall's Dictionary of Chemistry, 5th ed)
Monosaccharides
Cell Membrane
Isotope Labeling
Cytosol
Immunoelectrophoresis
A technique that combines protein electrophoresis and double immunodiffusion. In this procedure proteins are first separated by gel electrophoresis (usually agarose), then made visible by immunodiffusion of specific antibodies. A distinct elliptical precipitin arc results for each protein detectable by the antisera.
Cyanogen Bromide
DNA
A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).
Cells, Cultured
Endopeptidases
Plants
Multicellular, eukaryotic life forms of kingdom Plantae (sensu lato), comprising the VIRIDIPLANTAE; RHODOPHYTA; and GLAUCOPHYTA; all of which acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations.
Erythrocytes
Blotting, Western
Acetates
Protein Conformation
The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).
Methylation
Microsomes, Liver
Electrophoresis, Disc
Electrophoresis in which discontinuities in both the voltage and pH gradients are introduced by using buffers of different composition and pH in the different parts of the gel column. The term 'disc' was originally used as an abbreviation for 'discontinuous' referring to the buffers employed, and does not have anything to do with the shape of the separated zones.
Sugar Alcohols
Tissue Distribution
Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios.
Chymotrypsin
Electrochemistry
Mannose
Ultrafiltration
The separation of particles from a suspension by passage through a filter with very fine pores. In ultrafiltration the separation is accomplished by convective transport; in DIALYSIS separation relies instead upon differential diffusion. Ultrafiltration occurs naturally and is a laboratory procedure. Artificial ultrafiltration of the blood is referred to as HEMOFILTRATION or HEMODIAFILTRATION (if combined with HEMODIALYSIS).
Hexanes
Carbon Radioisotopes
Galactose
An aldohexose that occurs naturally in the D-form in lactose, cerebrosides, gangliosides, and mucoproteins. Deficiency of galactosyl-1-phosphate uridyltransferase (GALACTOSE-1-PHOSPHATE URIDYL-TRANSFERASE DEFICIENCY DISEASE) causes an error in galactose metabolism called GALACTOSEMIA, resulting in elevations of galactose in the blood.
Binding, Competitive
Chickens
Peptide Hydrolases
Circular Dichroism
Adsorption
Immunoassay
Cross Reactions
Brain
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
Lung
Quality Control
Structure-Activity Relationship
Lipids
A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are insoluble in water. They comprise the fats, fatty oils, essential oils, waxes, phospholipids, glycolipids, sulfolipids, aminolipids, chromolipids (lipochromes), and fatty acids. (Grant & Hackh's Chemical Dictionary, 5th ed)
Immune Sera
Gas Scavengers
Plant Lectins
Protein or glycoprotein substances of plant origin that bind to sugar moieties in cell walls or membranes. Some carbohydrate-metabolizing proteins (ENZYMES) from PLANTS also bind to carbohydrates, however they are not considered lectins. Many plant lectins change the physiology of the membrane of BLOOD CELLS to cause agglutination, mitosis, or other biochemical changes. They may play a role in plant defense mechanisms.
Plants, Medicinal
Drug Contamination
Sialic Acids
Streptomyces
Edetic Acid
Mutation
Water
Silicon Dioxide
Carboxylic Acids
Membrane Proteins
The gas-liquid chromatograph and the electron capture detection in equine drug testing. (1/4089)
Three gas-liquid chromatographic (G.L.C.) procedures discussed have been designed around the four "esses" of detection tests--speed, sensitivity, simplicity, and specificity. These techniques are admirably applicable to the very low plasma drug levels encountered in blood testing under pre-race conditions. The methods are equally applicable to post-race testing procedures, where both blood and urine samples are tested. Drugs can only rarely be detected by the electron capture detector (E.C.D.) without a prior derivatization step, which conveys to the drug(s) high electron affinity. Because of broad applicability, two derivatizing agents, heptafluorobutyric (HFBA) and pentafluorpropionic (PFPA) anhydrides are employed. The three techniques, allowing broad coverage of various drug classes are: 1) direct derivatization of drugs to form strongly electron capturing amides and esters. 2) reductive fragmentation of drugs with lithium aluminum hydride to form alcohols, with conversion to ester derivatives. 3) oxidative fragmentation of drugs with potassium dichromate to form derivatizable groups, followed by direct derivatization. (+info)Research and identification of tranquillizers - use of retention index. (2/4089)
At the request of the Service des Haras, our laboratory works on the toxicological problems of the sport-horse. These studies have resulted in the setting up of an anti-doping control for equestrian competitions of various types, not only flat racing. During events, horses, must be calm and docile to the riders' order. Frequently, the latter use tranquillizers to try and win events. The analytical method for the research and identification of these compounds is described. The technique involves successively: 1. alkalinisation of the sample - saliva, blood or urine after enzymatic hydrolysis. 2. extraction with diethyl ether - the recovery is 70% to 90% depending upon the drug. 3. determination by gas-liquid chromatography with use of a retention index for qualitative analysis. We can detect up to fifteen tranquillizers in any one sample, even when present at such low concentrations as found in saliva. The use of the retention index is a reliable method for qualitative analysis. For example, the method has been used for three years, during which period the rentention index of acetylpromazine remained at 3240 +/- 7. The chromatographic analysis was performed on 3% OV-17 at 290 degrees. The chromatographic analysis has been performed by three columns of different polarity (OV-1; OV-17; SP-2250). If on the three columns, the retention index of one peak is the same as that of the tranquilizer, a further confirmation is made with the use of a thermionic detector specific for nitrogenous drugs. In conclusion, this method which is sufficiently precise and specific has been used for anti-doping control. (+info)Less common "doping" agents and substances encountered during routine screening for drugs. (3/4089)
The chromatographic and spectroscopic properties of several unusual substances which have been detected in the "alkaloidal" chloroform extract from racehorse urine and saliva samples are reported. Some of these substances have been identified by combined gas chromatography-mass spectrometry and the source of the substance is stated where this is known. Other substances whose identity is not known have been detected and their mass spectra show characteristic amine fragments. The occurrence of these unidentified substances is more frequent in aged urine samples and it would therefore appear that they are associated with putrefaction. (+info)Solid-phase microextraction and GC-ECD of benzophenones for detection of benzodiazepines in urine. (4/4089)
Benzodiazepines are common drugs that cause intoxication. Benzodiazepines and their metabolites can be converted by hydrolysis in acid to the corresponding benzophenones, which are easier to be separated from matrices because of their hydrophobic properties. In this study, a new separation technique called solid-phase microextraction (SPME), which can integrate extraction, concentration, sampling and sample introduction into one single procedure, has been employed to extract the products of benzodiazepines from urine after acid hydrolysis. The extracts were determined by gas chromatography with electron-capture detection (GC-ECD). The hydrolysis conditions were optimized by a statistic orthogonal design. Factors influencing direct-immersion (DI)-SPME process were also checked and chosen experimentally. The method was evaluated with spiked human urine samples. The recoveries of nine benzodiazepines ranged from 1 to 25%, with the highest for oxazolam and the lowest for bromazepam. The calibration curves were linear from 10 to 500 ng/mL for oxazolam, haloxazolam, flunitrazepam, nimetazepam, and clonazepam and from 20 to 1000 ng/mL for the others except bromazepam. The detection limits were 2-20 ng/mL for most drugs tested. The intraday and interday coefficients of variation of the developed method were within 10 and 17%, respectively. In addition, the utility of the method was confirmed by determining two ingested benzodiazepines (flunitrazepam and oxazolam) in a volunteer's urine; urine flunitrazepam was still detectable 32 h after a therapeutic dose (1.2 mg) of the drug. Finally, the DI-SPME was compared with the conventional liquid-liquid extraction with regard to detection limits and extraction efficiency of the analytes. By DI-SPME, more amounts of analytes could be introduced into GC column than by conventional liquid-liquid extraction, and thus lower detection limits of the analytes were reached, although benzophenone recoveries by DI-SPME were rather low. (+info)Gas-liquid chromatography of the heptafluorobutyrate derivatives of the O-methyl-glycosides on capillary columns: a method for the quantitative determination of the monosaccharide composition of glycoproteins and glycolipids. (5/4089)
We have developed a method involving the formation of hepta-fluorobutyrate derivatives of O-methyl-glycosides liberated from glycoproteins and glycolipids following methanolysis. The stable derivatives of the most common monosaccharides of these glycoconjugates (Ara, Rha, Xyl, Fuc, Gal, Man, Glc, GlcNAc, GalNAc, Neu5Ac, KDN) can be separated and quantitatively and reproducibly determined with a high degree of sensitivity level (down to 25 pmol) in the presence of lysine as an internal standard. The GlcNAc residue bound to Asn in N-glycans is quantitatively recovered as two peaks. The latter were easily distinguished from the other GlcNAc residues of N-glycans, thus allowing a considerable improvement of the data on structure of N-glycans obtained from a single carbohydrate analysis. The most common contaminants present in buffers commonly used for the isolation of soluble or membrane-bound glycoproteins (SDS, Triton X-100, DOC, TRIS, glycine, and polyacrylamide or salts, as well as monosaccharide constituents of proteoglycans or degradation products of nucleic acids) do not interfere with these determinations. A carbohydrate analysis of glycoproteins isolated from a SDS/PAGE gel or from PDVF membranes can be performed on microgram amounts without significant interferences. Since fatty acid methyl esters and sphingosine derivatives are separated from the monosaccharide peaks, the complete composition of gangliosides can be achieved in a single step starting from less than 1 microg of the initial compound purified by preparative Silicagel TLC. Using electron impact ionization mass spectrometry, reporter ions for the different classes of O-methyl-glycosides (pentoses, deoxy-hexoses, hexoses, hexosamines, uronic acids, sialic acid, and KDN) allow the identification of these compounds in very complex mixtures. The mass of each compound can be determined in the chemical ionization mode and detection of positive or negative ions. This method presents a considerable improvement compared to those using TMS derivatives. Indeed the heptafluorobutyrate derivatives are stable, and acylation of amino groups is complete. Moreover, there is no interference with contaminants and the separation between fatty acid methyl-esters and O-methyl glycosides is achieved. (+info)Methodological issues in biomonitoring of low level exposure to benzene. (6/4089)
Data from a pilot study on unmetabolized benzene and trans,trans muconic acid (t,t-MA) excretion in filling station attendants and unexposed controls were used to afford methodological issues in the biomonitoring of low benzene exposures (around 0.1 ppm). Urinary concentrations of benzene and t,t-MA were measured by dynamic head-space capillary GC/FID and HPLC, respectively. The accuracy of the HPLC determination of t,t-MA was assessed in terms of inter- and intra-method reliability. The adequacy of urinary t,t-MA and benzene as biological markers of low benzene exposure was evaluated by analysing the relationship between personal exposure to benzene and biomarker excretion. Filling station attendants excreted significantly higher amounts of benzene, but not of t,t-MA, than controls. Adjusting for occupational benzene exposure, smokers excreted significantly higher amounts of t,t-MA, but not of unmetabolized benzene, than nonsmokers. A comparative analysis of the present and previously published biomonitoring surveys showed a good inter-study agreement regarding the amount of t,t-MA and unmetabolized benzene excreted (about 0.1-0.2 mg/l and 1-2 micrograms/l, respectively) per unit of exposure (0.1 ppm). For each biomarker, based on the distribution of parameters observed in the pilot study, we calculated the minimum sample size required to estimate the population mean with given confidence and precision. (+info)The structure of a glycopeptide (GP-II) isolated from Rhizopus saccharogenic amylase. (7/4089)
Mild alkaline treatment of glycopeptide (GP-II) resulted in the loss of 1 mole of serine and 5 moles of threonine per mole of GP-II, suggesting the presence of O-glycosyl bonds between 1 serine and 5 threonine residues and carbohydrate chains. Treatment of GP-II with alkaline borohydride released only disaccharide. Methylation studies of the carbohydrate moiety gave 2,3,4,6-tetra-O-methyl and 2,4,6-tri-O-methyl derivatives of mannose in a ratio of approximately 1:1. In addition, one step of Smith degradation resulted in the loss of about 6 residues of mannose per mole of GP-II. Moreover, alpha-mannosidase [EC 3.2.1.24] liberated about 6 residles of mannose per mole of GP-II. On the basis of these data, the structure of the carbohydrate moiety of GP-II was confirmed to be 3-O-alpha-mannosylmannose. The amino- and carboxyl-terminal amino acids of GP-II were determined to be threonine and serine, respectively. On reductive cleavage of N-proline bonds with metallic sodium in liquid ammonia, 2 moles of alanine per mole of GP-II were lost. From the compositions of three fragments isolated from the reductive cleavage products, the amino acid sequence of the peptide portion of GP-II was determined. Based on these data, a probable structure was proposed for GP-II. (+info)Cellular fatty acids and metabolic products of Pseudomonas species obtained from clinical specimens. (8/4089)
The cellular fatty acid composition of 112 reference strains and clinical isolates of Pseudomonas species was determined by gas-liquid chromatography (GLC). The presence and relative amounts of cyclopropane, hydroxy, and branched-chain fatty acids were distinguishing features of these strains. Determination of short-chain fatty acids extracted from spent growth media provided an additional means for identifying some strains. Our results show that clinical isolates of pseudomonads can be divided into eight distinct GLC groups. The procedures were especially useful for distinguishing glucose-nonoxidizing pseudomonads, which are difficult to identify by conventional criteria. Since the GLC procedures are simple, rapid, and highly reproducible, they are useful in diagnostic laboratories that process large numbers of cultures. Coupled with selected conventional tests, the analysis of short-chain and cellular fatty acids can be very useful for rapid screening of clinical isolates of Pseudomonas species. (+info)
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US Patent # 4,883,504. Gas chromatograph - Patents.com
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Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed- Flow Gas Chromatographic Technique
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Tauro-7 alpha, 12 alpha-dihydroxy-5 beta-cholanic acid as internal standard in the gas-liquid chromatographic analysis of bile...
Enantioselective gas chromatographic analysis of monoterpenes in essential oils of the family Myrtaceae - DRO
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Analysis by gas liquid chromatography of production of volatile fatty acids by anaerobic bacteria grown on solid medium. |...
Microscale preparation of pentafluorobenzyl esters. Electron-capture gas chromatographic detection of indole-3-acetic acid from...
Detection of Volatile Aroma Compounds of Morchella by Headspace Gas Chromatography Mass Spectrometry (HS-GC/MS) | AVESİS
Effects of Preharvest Precipitation, Air Temperature, and Humidity on the Occurrence of Soft Scald in Honeycrisp Apples in:...
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Simultaneous determination of phenylureas and triazines in water, by capillary gas chromatography with ion trap detection
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Doping in sport
Gas chromatography-combustion-IRMS[edit]. The gas chromatography-combustion-IRMS is a way to detect any variations in the ...
Gas chromatography-mass spectrometry
... (GC-MS) is an analytical method that combines the features of gas-chromatography and mass ... Pyrolysis-gas chromatography-mass spectrometry. References[edit]. *^ O. David Sparkman; Zelda Penton; Fulton G. Kitson (17 May ... Niessen, W. M. A. (2001). Current practice of gas chromatography-mass spectrometry. New York, N.Y: Marcel Dekker. ISBN 978-0- ... The first on-line coupling of gas chromatography to a mass spectrometer was reported in 1959.[2][3][4] The development of ...
Mass spectrometry
Main article: Gas chromatography-mass spectrometry. A common combination is gas chromatography-mass spectrometry (GC/MS or GC- ... Similar to gas chromatography MS (GC-MS), liquid chromatography-mass spectrometry (LC/MS or LC-MS) separates compounds ... The duty cycle of IMS is short relative to liquid chromatography or gas chromatography separations and can thus be coupled to ... Eiceman, G.A. (2000). Gas Chromatography. In R.A. Meyers (Ed.), Encyclopedia of Analytical Chemistry: Applications, Theory, and ...
Analytical chemistry
For example, gas chromatography-mass spectrometry, gas chromatography-infrared spectroscopy, liquid chromatography-mass ... Bartle, Keith D.; Myers, Peter (2002). "History of gas chromatography". TrAC Trends in Analytical Chemistry. 21 (9-10): 547. ... Chromatography, electrophoresis and Field Flow Fractionation are representative of this field. Hybrid techniques[edit]. ... Most often the other technique is some form of chromatography. Hyphenated techniques are widely used in chemistry and ...
Bendix Corporation
"Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019.. *^ "Marine Surplus Seller, Issues 13- ... Harrington of Bendix Aviation in the 1950s led to the combination of gas chromatography and mass spectrometry, and the ... development of Gas chromatography-mass spectrometry instrumentation. Beginning in the 1960s, Bendix produced scientific ... Criteria was met for hostile and non-hostile environments that provided seals against liquids and gasses. ...
J. J. Thomson
"Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 November 2019.. *^ a b c d "J.J. Thomson - ... The Early Life of J.J. Thomson: Computational Chemistry and Gas Discharge Experiments. ... He found that whatever the material of the anode and the gas in the jar, the deflection of the rays was the same, suggesting ... Thomson was awarded the 1906 Nobel Prize in Physics for his work on the conduction of electricity in gases.[4] ...
Elution
In liquid chromatography, the eluent is the liquid solvent; in gas chromatography, it is the carrier gas.[1] ... In a liquid chromatography experiment, for example, an analyte is generally adsorbed, or "bound to", an adsorbent in a liquid ... For instance, a mixture of amino acids may be separated by ion-exchange chromatography. Under a particular set of conditions, ... Brown, Phillis (2001). Advances in chromatography. CRC Press. p. 36. ISBN 0-8247-0509-2. .. ...
Zolpidem
Analytical techniques, in general, involve gas or liquid chromatography.[33][34][35] ...
National Technological University - Córdoba Regional Faculty
Gas Chromatography. Physics of Materials. Projects Management This NTU College is one of the 24 regional faculties of the ...
Conservation scientist
Gas chromatography-mass spectrometry (GC-MS): Combines gas chromatography (which uses gas "to separate complex mixtures of ... Pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS): Combines gas chromatography and mass spectrometry on a heated sample ... 2014). Chromatography. Retrieved April 19, 2014. CAMEO. (2014).Gas chromatography. Retrieved April 19, 2014. National Gallery ... The heat decomposes the sample, producing smaller molecules to be separated by the gas chromatography and detected by the mass ...
Tetrazepam
"Analysis of benzodiazepine derivative mixture by gas-liquid chromatography" (PDF). Medicina (Kaunas, Lithuania) (in Lithuanian ... Journal of Chromatography A. 1216 (15): 3192-8. doi:10.1016/j.chroma.2009.02.001. ISSN 0021-9673. PMID 19233363. Schubert, B; ... "Determination of benzodiazepine derivatives mixture by high performance liquid chromatography". Medicina (Kaunas, Lithuania). ...
Archer Martin
"Gas-Liquid Chromatography: A Technique for the Analysis and Identification of Volatile Materials" reported the discovery of gas ... He developed partition chromatography whilst working on the separation of amino acids, and later developed gas-liquid ... "Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 November 2019. "Nobel Winner Archer Martin Dies ... JAMES, AT; MARTIN, AJ (1954). "Gas-liquid chromatography; a technique for the analysis and identification of volatile materials ...
Bromoketamine
Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences. 794 (1): 99-108. doi:10.1016/s1570- ... "Gas chromatographic analysis of ketamine and norketamine in plasma and urine: nitrogen-sensitive detection". Journal of ... "Determination of the enantiomers of ketamine and norketamine in human plasma by enantioselective liquid chromatography-mass ... Chromatography. 232 (2): 305-14. doi:10.1016/s0378-4347(00)84170-5. PMID 6818238. Rodriguez Rosas ME, Patel S, Wainer IW ( ...
Levophacetoperane
I. Gas chromatographic detection procedure with electron capture detection for some secondary amines". Journal of ... Chromatography. 106 (2): 412-7. doi:10.1016/S0021-9673(00)93853-6. PMID 239015. US 20150038533, Konofal E, Figadere B, " ...
Fetor hepaticus
Kaji, H; Hisamura, M; Saito, N; Murao, M (May 1, 1978). "Gas chromatographic determination of volatile sulfur compounds in the ... expired alveolar air in hepatopathic subjects". Journal of Chromatography. 145 (3): 464-8. doi:10.1016/s0378-4347(00)81377-8. ...
Forensic chemistry
Gas chromatography (GC) performs the same function as liquid chromatography, but it is used for volatile mixtures. In forensic ... These include high-performance liquid chromatography, gas chromatography-mass spectrometry, atomic absorption spectroscopy, ... HPLC is used for nonvolatile mixtures that would not be suitable for gas chromatography. This is useful in drug analysis where ... "Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019. Gohlke, Roland S.; McLafferty, Fred W ...
Fred McLafferty
He took a position at Dow Chemical in Midland, Michigan in 1950 and was in charge of mass spectrometry and gas chromatography ... "Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019. Gohlke, Roland S.; McLafferty, Fred W ... With Roland Gohlke, he pioneered the technique of gas chromatography-mass spectrometry. He is also known for electron capture ... Biography portal McLafferty rearrangement Gas chromatography-mass spectrometry Electron capture dissociation "Seven Cornellians ...
Bendix Aviation
This led to the development of Gas chromatography-mass spectrometry instruments such as the Bendix MA-2 Time-of-Flight Mass ... "Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019. CS1 maint: discouraged parameter (link ... Harrington at Bendix Aviation to demonstrate the potential of combining gas chromatography and mass spectrometer. ... MSA and Cousteau-Gagnon Demand Breathing Appliances for Descents to 400 Feet and the Measurement of the Amounts of Gas Required ...
Shock diamond
... s can be seen during gas pipeline blowdowns because the gas is under high pressure and exits the blowdown valve at ... CS1 maint: discouraged parameter (link) Niessen, Wilfried M. A. (1999). Liquid chromatography-mass spectrometry. 79. CRC Press ... The jets travel at supersonic speed through a thin "atmosphere" of gas in space, so it is hypothesized that these knots are ... The higher ambient pressure compresses the flow, and since the resulting pressure increase in the exhaust gas stream is ...
History of mass spectrometry
The use of a mass spectrometer as the detector in gas chromatography was developed during the 1950s by Roland Gohlke and Fred ... "Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019. Gohlke, R. S. (1959). "Time-of-Flight ... Gohlke, R. S.; McLafferty, F. W. (1993). "Early gas chromatography/mass spectrometry". J. Am. Soc. Mass Spectrom. 4 (5): 367- ... The study of gas discharges in the mid 19th century led to the discovery of anode and cathode rays, which turned out to be ...
National Historic Chemical Landmarks
"Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019. National Historic Chemical Landmarks ( ... Elmo Brady, the First African-American Ph.D. in Chemistry Steroid Medicines and Upjohn Innovation Gas Chromatography-Mass ... "Neil Bartlett and Reactive Noble Gases". National Historic Chemical Landmarks. American Chemical Society. Archived from the ... "Discovery of Helium in Natural Gas". American Chemical Society. National Historic Chemical Landmarks. Retrieved 2017-11-11. " ...
Robert E. Finnigan
"Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 Nov 2019. Grayson, Michael A. (2002). Measuring ... Robert Emmet Finnigan (born May 27, 1927) is an American pioneer in the development of gas chromatography-mass spectrometry ... Modern practice of gas chromatography. Hoboken, NJ: Wiley-Interscience. ISBN 978-0-471-22983-4. Retrieved 6 February 2017. ... An EPA manual for organic analysis using gas chromatography - mass spectrometry. Environmental Protection Agency. pp. 2, 4. ...
Francis William Aston
"Gas Chromatography-Mass Spectrometry". American Chemical Society. Retrieved 19 November 2019. D.Sc, F. W. Aston M. A. (1 ... Aston studied the current through a gas-filled tube. The research, conducted with self-made discharge tubes, led him to ... "Experiments on the Length of the Cathode Dark Space with Varying Current Densities and Pressures in Different Gases". ...
Kabuse tea
ISBN 978-1-60774-172-5. Linskens, Hans-Ferdinand; Jackson, John F. (2012-12-06). Gas Chromatography/Mass Spectrometry. Springer ...
Perfluorocarbon tracer
The sample is then admitted to a gas chromatograph. This splits up the different PFTs, so a concentration value can be ... Analysis of the samples typically involves three parts; preparation, chromatography and detection. Preparation involves removal ... In either design the system is then filled with pressurised, de-gassed oil. The oils primary function is to improve the ...
3-Fluoromethcathinone
"Analysis of Amphetamine-Derived Designer Drugs by Gas Chromatography with Mass Spectrometry". Journal of Analytical Toxicology ...
Ester
... s are generally identified by gas chromatography, taking advantage of their volatility. IR spectra for esters feature an ... for analysis by gas chromatography. The method is useful in specialized organic synthetic operations but is considered too ...
Alkaloid
"Gas-chromatography and UV-spectroscopy of Hymenoptera venoms obtained by trivial centrifugation". Data in Brief. 18: 992-998. ... or solvent extractions followed by silica-gel column chromatography.[7] Alkaloids have a wide range of pharmacological ... followed by silica-gel chromatography purification.[185] Tracking and dosing the extracted solenopsin ant alkaloids has been ...
Oxazoline
... derivatives are amenable to analysis by gas chromatography. From carboxylic acids[edit]. Modification of the Appel reaction ...
Materials science
... chromatography, thermal analysis, electron microscope analysis, etc. Structure is studied at various levels, as detailed below ... is used for underground gas and water pipes, and another variety called ultra-high-molecular-weight polyethylene (UHMWPE) is an ...
Lactose intolerance
Stool sugar chromatography[edit]. Chromatography can be used to separate and identify undigested sugars present in faeces. ... Bacteria in the colon can metabolise lactose, and the resulting fermentation produces copious amounts of gas (a mixture of ... gas, and nausea.[1] These symptoms typically start thirty minutes to two hours after eating or drinking milk-based food.[1] ... can be detected on the patient's breath by a clinical gas chromatograph or compact solid-state detector. The test takes about ...
Yohimbine
Betz JM, White KD, der Marderosian AH (1995). "Gas chromatographic determination of yohimbine in commercial yohimbe products". ... "Profiling the indole alkaloids in yohimbe bark with ultra-performance liquid chromatography coupled with ion mobility ... "A validated high performance thin layer chromatography method for determination of yohimbine hydrochloride in pharmaceutical ...
Scutellaria
"Identification of phenolic compounds from Scutellaria lateriflora by liquid chromatography with ultraviolet photodiode array ...
Pepper spray
... place of business or place of public gathering any tear gas, mustard gas, phosgene gas or other noxious or nauseating gases or ... High performance liquid chromatography (HPLC) is used to measure the amount of capsaicin and major capsaicinoids within pepper ... Illegal use of tear gas, phosgene and other gases". law.lis.virginia.gov. Retrieved 2018-06-29.. ... Illegal use of tear gas, phosgene and other gases. "If any person maliciously release or cause or procure to be released in any ...
Evaporation
... is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.[1] The ... to dry or concentrate samples is a common preparatory step for many laboratory analyses such as spectroscopy and chromatography ... See also: Kinetic theory of gases. For molecules of a liquid to evaporate, they must be located near the surface, they have to ... Liquids that do not evaporate visibly at a given temperature in a given gas (e.g., cooking oil at room temperature) have ...
Chemistry
The inert gases, later called the noble gases were discovered by William Ramsay in collaboration with Lord Rayleigh at the end ... They can be analyzed using the tools of chemical analysis, e.g. spectroscopy and chromatography. Scientists engaged in chemical ... The "inert" or noble gas elements (helium, neon, argon, krypton, xenon and radon) are composed of lone atoms as their smallest ... Matter can be studied in solid, liquid, gas and plasma states, in isolation or in combination. The interactions, reactions and ...
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Affinity Chromatography»։ Sigma-Aldrich։ Արխիվացված օրիգինալից 2016-05-07-ին *↑ «HiTrap Heparin HP»։ GE Healthcare Life ... Higgins, C. (October 2007)։ «The use of heparin in preparing samples for blood-gas analysis»։ Medical Laboratory Observer ... Purification of retrovirus particles using heparin affinity chromatography։ Methods Mol Biol 434 (434)։ 2008։ էջեր 1-11։ ISBN ... Fractionation of proteins by heparin chromatography։ Methods Mol Biol։ Methods in Molecular Biology™ 424։ 2008։ էջեր 213-21։ ...
Spectrophotometry
By running an affinity chromatography, B-Galactosidase can be isolated and tested by reacting collected samples with ONPG and ... or gases. Although many biochemicals are colored, as in, they absorb visible light and therefore can be measured by ...
Chicanná
2014). Identification of indigoid compounds present in archaeological Maya blue by pyrolysis-silylation-gas chromatography-mass ...
Methylenedioxypyrovalerone
MDPV may be quantified in blood, plasma or urine by gas chromatography-mass spectrometry or liquid chromatography-mass ... by gas chromatography/mass spectrometry and liquid chromatography/quadrupole time-of-flight mass spectrometry". Rapid ... Products labeled as bath salts containing MDPV were previously sold as recreational drugs in gas stations and convenience ...
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Affinity chromatography. Column chromatography. Displacement chromatography. Electrochromatography. Gas chromatography. High- ... Paper chromatography. Reversed-phase chromatography. Size-exclusion chromatography. Thin-layer chromatography. Two-dimensional ... performance liquid chromatography. Capillary electrochromatography. Ion chromatography. Micellar electrokinetic chromatography ... chromatography. Van Deemter equation. Chapter 3. Fundamental Spectroscopy. Raman spectroscopy. Rayleigh scattering. ...
Medical microbiology
Acids, alcohols and gases are usually detected in these tests when bacteria are grown in selective liquid or solid media, as ...
Pentaerythritol tetranitrate
... in plasma using gas chromatography-mass spectrometry.[49] ... Volume of gases produced: 790 dm3/kg (other value: 768 dm3/kg) ... These drugs work by releasing the signaling gas nitric oxide in the body. The heart medicine Lentonitrat is nearly pure PETN.[ ...
نوبل انعام برائے کیمیا وصول کنندگان کی فہرست - آزاد دائرۃ المعارف، ویکیپیڈیا
... molecular structure through his investigations on dipole moments and the diffraction of X-rays and electrons in gases"[31] ... "for their invention of partition chromatography"[44] رچرڈ لاورنس ملنگٹن سنجی برطانیہ ...
James Lovelock
He has invented a family of ionisation detectors for gas chromatography. His electron capture detectors are the most sensitive ... In a follow up interview Lovelock stated his support for natural gas; he now favors fracking as a low-polluting alternative to ... As phytoplankton and forests are the main ways in which Gaia draws down greenhouse gases, particularly carbon dioxide, taking ... He has many inventions, including a gas chromatograph, which will be used to investigate planetary atmospheres. His ...
Succinic semialdehyde dehydrogenase deficiency
... high levels of GHB but this can be difficult to measure since GHB has high volatility and may be obscured on gas chromatography ... Journal of Chromatography B. 792 (1): 99-106. doi:10.1016/S1570-0232(03)00276-9. ISSN 1570-0232. PMID 12829002.. ...
Ytterbium
The yellow-green ytterbium(II) ion is a very strong reducing agent and decomposes water, releasing hydrogen gas, and thus only ... "Optimization of Separation of Ytterbium and Lutetium by Displacement Complexing Chromatography". Russian Journal of Applied ... Ytterbium dissolves slowly in water, but quickly in acids, liberating hydrogen gas.[8] ...
Protein
Various types of chromatography are then used to isolate the protein or proteins of interest based on properties such as ... they are fermented producing hydrogen sulfide gas, indole, and skatole.[76] Dogs and cats digest animal proteins better than ... As a result, when the lysate is passed over a chromatography column containing nickel, the histidine residues ligate the nickel ... and chromatography; the advent of genetic engineering has made possible a number of methods to facilitate purification. Methods ...
Index of chemistry articles
Anfinsen Chromatography Chromite Chromium Chrysoberyl Chrysolite cinnabar Cinnabarite Citric acid Citrine quartz Clay Cleveite ... g-block Gabbro Gadolinite Gadolinium Galena gallium Gallium arsenide Garnet gas gaseous Gedanite Geometric isomerism Geoffrey ... Nitric acid Nitric oxide nitrogen Nitrogen dioxide Nitroglycerine Nitrous oxide Nobel Prize in Chemistry Nobelium Noble gas ... Emil Fischer Hermann Staudinger heterocyclic compound Hexane Hiddenite Hideki Shirakawa High performance liquid chromatography ...
Germanium
Sol-Gel Hybrid Organic-Inorganic Coatings for Capillary Microextraction and Gas Chromatography". Anal. Chem. 79 (24): 9441-9451 ... the silica stationary phase in some gas chromatography columns can be replaced by GeO2.[73] ... 3) were found to be less hazardous and may be used as a liquid substitute for toxic germane gas in semiconductor applications. ... For example, germanium chloride and germane (GeH4) are a liquid and gas, respectively, that can be very irritating to the eyes ...
வேதியியலுக்கான நோபல் பரிசு பெற்றவர்கள் - தமிழ் விக்கிப்பீடியா
... molecular structure through his investigations on dipole moments and the diffraction of X-rays and electrons in gases"[38] ... "for their invention of partition chromatography"[51] Richard Laurence Millington Synge United Kingdom ...
Stimulant
Products labeled as bath salts containing MDPV were previously sold as recreational drugs in gas stations and convenience ... Commonly used tests include chromatography, immunologic assay, and mass spectrometry.[129] See also[edit]. *Antipsychotics ...
Rohypnol - Simple English Wikipedia, the free encyclopedia
"Analysis of benzodiazepine derivative mixture by gas-liquid chromatography". Medicina (Kaunas) 38 (3): 316-20. PMID 12474705. ...
Biotechnology
By the mid-1980s, other BioFETs had been developed, including the gas sensor FET (GASFET), pressure sensor FET (PRESSFET), ... industrial biotechnology is actively advancing towards lowering greenhouse gas emissions and moving away from a petrochemical- ...
List of plasma physics articles
Jellium, uniform electron gas, homogeneous electron gas. *Jet (particle physics). *Jet quenching ... Chromatography detector. *Chromo-Weibel instability. *Classical-map hypernetted-chain method. *Cnoidal wave ...
Melamine
... both based on liquid chromatography - mass spectrometry (LC/MS) detection after hydrophilic interaction liquid chromatography ( ... Hot ammonia gas is also present to fluidize the bed and inhibit deammonization. The effluent then is cooled. Ammonia and carbon ... The above reaction can be carried out by either of two methods: catalyzed gas-phase production or high pressure liquid-phase ... The off-gas contains large amounts of ammonia. Therefore, melamine production is often integrated into urea production, which ...
Malolactic fermentation
A paper chromatography sheet showing that one wine still has some level of malic present while the other three wines have ... Like primary alcoholic fermentation, this phenomenon would release carbon dioxide gas and seem to have a profound change on the ... The paper chromatography method involves using capillary tubes to add small samples of the wine to chromatograph paper. The ... A significant limitation to paper chromatography is that it will not show exactly how much malic is still remaining in the wine ...
Gas chromatography-mass spectrometry - Wikipedia
Gas chromatography-mass spectrometry (GC-MS) is an analytical method that combines the features of gas-chromatography and mass ... Pyrolysis-gas chromatography-mass spectrometry. References[edit]. *^ O. David Sparkman; Zelda Penton; Fulton G. Kitson (17 May ... Niessen, W. M. A. (2001). Current practice of gas chromatography-mass spectrometry. New York, N.Y: Marcel Dekker. ISBN 978-0- ... The first on-line coupling of gas chromatography to a mass spectrometer was reported in 1959.[2][3][4] The development of ...
Complete Gas Chromatography & GC-MS Training
... 14 - 18 October 2019, Milton Keynes, United Kingdom ... Independent experts providing training and consultancy in the analytical science fields of Gas Chromatography, Liquid ... This 5-day course provides a complete training solution enabling you to understand your Gas Chromatograph or GC-MS instrument, ... This course provides the essential and practical theory about all available GC & GC-MS techniques, covering gases and plumbing ...
Gas Chromatography News, Research
A new study presented at the 254th National Meeting & Exposition of the American Chemical Society (ACS), suggests that avocado seed husks contain a treasure of unidentified chemical compounds which has the potential to be used in treating various debilitating diseases such as, cancer and heart diseases, as well as in enhancing perfumes, cosmetics and other consumer goods.. ...
Temperature-programmed gas chromatography | chemistry | Britannica.com
... chromatography: Gas chromatography: This technique is termed temperature-programmed gas chromatography. ... Other articles where Temperature-programmed gas chromatography is discussed: ... In chromatography: Gas chromatography. This technique is termed temperature-programmed gas chromatography. ... Temperature-programmed gas chromatography. chemistry. THIS IS A DIRECTORY PAGE. Britannica does not currently have an article ...
Gas Chromatography Market Worth 3.67 Billion USD by 2022
Gas Chromatography Market by Instrument (Systems, Detectors), Accessories and Consumables (Columns,... ... In 2016, the oil and gas industry segment commanded the largest share of the global Gas Chromatography Market. The large share ... Browse 86 market data Tables and 31 Figures spread through 167 Pages and in-depth TOC on Gas Chromatography Market ... gas generators, and other accessories. The columns segment accounted for the largest share of the global Gas Chromatography ...
Gas chromatography - Food
Ultra-fast gas chromatography means analysis cycle times are decreasing so the time to prepare the samples to be analysed is ... Phenomenex opens gas chromatography facility 01-Jun-2017. By Joseph James Whitworth ... SCION Instruments has set its sights on tailoring the capabilities of gas chromatography systems to meet specific analytical ... SepSolve Analytical claims its flow modulator for routine two-dimensional gas chromatography (GC×GC) analyses will broaden ...
Chromatography Inline Gas Filters
Improve gas quality and optimize GC analysis with easy-to-use Thermo Scientific™ Super Clean™ Gas Cartridge Filters. ... Thermo Scientific™ Click-On™ Inline Gas Filters Eliminate contamination from your gas source for optimal GC performance with ... Thermo Scientific™ Click-On™ Inline Gas Filter Connectors Use these quality end fittings o-rings, and other connectors for your ... Whatman™ HEPA-Vent Filters are ideal for air and gas filtration applications where high retention, dirt-holding capacity and ...
Hydrocarbon Gas Chromatography Specialist
... 19 February, 2019 You will be required to perform the following: Perform advanced ... Knowledge of gas chromatography applied to gas analysis and refined products is expected. Prior experience in hyphenated ... Perform advanced testing using gas chromatography techniques to characterize various oil and gas industrial samples in ... Your primary role is to participate in the chromatography lab in support of the gas and petroleum hydrocarbon characterization ...
Patent US3889538 - Sample vaporizer for gas chromatography - Google Patents
The drop exiting from the lower open end of the tube is instantaneously vaporized, and the carrier gas or eluting gas carries ... To 024w SAMPLE VAPORIZER FOR GAS CHROMATOGRAPHY This invention relates to gas chromatography, and particularly to an apparatus ... in a carrier gas stream wherein the liquid is flash vaporized and flushed by the carrier gas stream into a gas chromatography ... As is usual in the art of gas chromatography, small samples of liquids are utilized, usually 0.0001 to 1.0 milliliter (0.1 to ...
Absolute Basics of Gas Chromatography & GC-MS Training Course
... 31 January 2020, Milton Keynes, United Kingdom ... This 1-day course provides an introduction for complete beginners to gas chromatography and GC-MS, explaining the principles of ... Independent experts providing training and consultancy in the analytical science fields of Gas Chromatography, Liquid ... You will learn about the components of the gas chromatograph and the mass spectrometer, the purpose and prinicples of data ...
Gas Chromatography-Mass Spectrometry (GC-MS) Applications
Gas chromatography-mass spectrometry (GC-MS) is a hybrid analytical technique that couples the separation capabilities of GC ... Gas chromatography-mass spectrometry (GC-MS) is a hybrid analytical technique that couples the separation capabilities of GC ... 2019, February 26). Gas Chromatography-Mass Spectrometry (GC-MS) Applications. News-Medical. Retrieved on December 15, 2019 ... Gas Chromatography-Mass Spectrometry (GC-MS) Applications. News-Medical. https://www.news-medical.net/life-sciences/Gas- ...
Gas-liquid chromatography in diagnosis of pyogenic arthritis. | The BMJ
Capillary gas chromatography-mass spectro... & related info | Mendeley
Kutztown University Gas Chromatography - Kutztown University
Kutztown Universitys gas chromatography instrumentation provides the tools for a solid foundation in this branch of separation ... In gas chromatography, a gas is used to carry a mixture across a bed of material. Because the gas moves, it is called the ... Applications of Gas Chromatography. Gas chromatography is a technique that has an enormous application base. Below is a tiny ... In gas chromatography (GC), the gaseous mobile phase is forced through the stationary phase using pressure. A simple GC would ...
Gas Chromatography System News | Environmental XPRT
Get the latest gas chromatography system news , the worlds largest environmental industry marketplace and information resource ... "gas chromatography system ": chromatography news , chromatography system news , gas chromatography news , process gas ... In June, Anthias Consulting celebrates ten years of sharing expertise in Gas Chromatography (GC) and Gas Chromatography-Mass ... Empowering Gas Chromatography operations with the AGC TrendVision Chromatography Software The TrendVision software from AGC ...
Analysis of Fatty Acids in Yersinia pestis by Gas Chromatography | SpringerLink
Tan Y. (2018) Analysis of Fatty Acids in Yersinia pestis by Gas Chromatography. In: Yang R. (eds) Yersinia Pestis Protocols. ... However, determining the cellular fatty acid (CFA) composition by gas chromatography (GC) could serve as an alternate method ... Samygin VM, Zykin LF, Stepanov VM, Stepin AA, Korsakova II (1994) A gas chromatographic analysis of the fatty acid composition ...
Gas chromatography mass spectrometry-based metabolite profiling in plants. - PubMed - NCBI
Gas chromatography mass spectrometry-based metabolite profiling in plants.. Lisec J1, Schauer N, Kopka J, Willmitzer L, Fernie ... Corrigendum: Gas chromatography mass spectrometry-based metabolite profiling in plants. [Nat Protoc. 2015] ... Here we provide a detailed protocol for gas chromatography mass spectrometry (GC-MS)-based metabolite profiling that offers a ... being considerably more sensitive than NMR and more robust than liquid chromatography-linked mass spectrometry. We summarize ...
Quantitative determination of glycerol in phospholipids by gas-liquid chromatography | SpringerLink
Gas Chromatography Market worth $3,605.1 Million by 2019: MarketsandMarkets
"Gas Chromatography Market". http://www.marketsandmarkets.com/Market-Reports/gas-chromatography-market-101656773.html. Early ... The global gas chromatography market is dominated by North America, followed by Europe, Asia, and the Rest of the World (RoW). ... The gas chromatography market has seen an extraordinary amount of technological advancements in the last few years, as ... The market for gas chromatography instrumentation is segmented into systems, detectors, auto-samplers and fraction collectors. ...
Waters Atmospheric Pressure Gas Chromatography (APGC) : Waters
Waters Atmospheric Pressure Gas Chromatography (APGC). APGC - No Compromise GC-MS. Waters Atmospheric Pressure Gas ... Home , Products , Instruments & Systems , Mass Spectrometry , Ion Sources , Waters Atmospheric Pressure Gas Chromatography ( ... Food Safety Magazine Webinar: Improved Identification of Pesticides using Atmospheric Pressure Gas Chromatography ... The 2017/18 Waters Quality Parts, Chromatography Columns and Supplies Catalog is available! Download or order your copy today. ...
Hydrogen Sensor For Gas Chromatography | Manufacturing.net
introduces the new Hydrogen Sensor for the 7890B Gas Chromatography system, which helps GC users move away from costly helium. ... Hydrogen Sensor For Gas Chromatography. Agilent Technologies Inc. introduces the new Hydrogen Sensor for the 7890B Gas ... introduced the new Hydrogen Sensor for the 7890B Gas Chromatography system. The new sensor helps GC users move away from costly ... helium carrier gas by providing the additional level of security many organizations require in order to use hydrogen. The self- ...
capillary gas chromatography column News | Environmental XPRT
Get the latest capillary gas chromatography column news , the worlds largest environmental industry marketplace and ... "capillary gas chromatography column": chromatography news , gas chromatography news , chromatography column news , gas ... ASTM E697 - 96(2011) Standard Practice for Use of Electron-Capture Detectors in Gas Chromatography This practice describes the ... NYSE: A) today introduced the Agilent LTM Series II system for gas chromatography, the second generation of its proprietary low ...
9780841237131 - Gas Chromatography-Olfactometry The | eCampus.com
9780841237131 Our cheapest price for Gas Chromatography-Olfactometry The State of the Art is $35.12. Free shipping on all ... Gas Chromatography-Olfactometry The State of the Art. by Leland, Jane V.; Scheiberle, Peter; Buettner, Andrea; Acree, Terry E. ... The Identification of Aroma Compounds in Key Lime Oil Using Solid-Phase Microextraction and Gas Chromatography-Olfactometry. ... Aroma of Roasted Sesame Oil: Characterization by Direct Thermal Desorption-Gas Chromatography-Olfactometry and Sample Dilution ...
codung | Gas Chromatography | Gas Chromatography-Mass Spectrometry
the quantitative and qualitative analysis by gas chromatography and mass spectrometry (GC-MS) as well as sensorial assays are ... and gas chromatography/mass spectrometry (GC/MS HP-5890). Twenty volatile compounds were identified in the extracts among them ... Study of the violatile composition of tomato during storage by a combination sampling method coupled with gas chromatography/ ... PA) exposed for 30 min at 60 °C in the headspace of the vial was then immediately inserted into the injection port of the gas ...
Iraq: Gas chromatography parts | MEED
Gas Chromatography/Fourier Transform Infrared Spectroscopy Applications | RTI
Middle Distillates Analysis and 2-dimensional Gas Chromatography
Benefits of 2-dimensional gas chromatography: 2-dimensional gas chromatography analysis (2D-GC) of middle distillates allows ... Middle distillates analysis with 2-dimensional gas chromatography.. 2-dimensional gas chromatography (GCXGC) analysis measures ... Products tested by GCXGC include diesel fuels (mineral diesel, light gas oil (LGO), medium gas oil (MGO), heavy gas oil (HGO), ... 2-dimensional gas chromatography analysis is available globally. Test samples can be easily shipped to the laboratory for ...
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Gas Chromatography: History, Methods and Applications - Nova Science Publishers
Gas Chromatography: History, Methods and Applications focuses on the main applications of gas chromatography in clinical and ... Gas Chromatography: History, Methods and Applications. Percy Henrichon (Editor). Series: Analytical Chemistry and ... Chapter 4. Gas Chromatography-Mass Spectrometry Analysis of Sugarcane Vinasse. (Mohamed A.Fagier and Mona O.Abdalrhman, ... The authors go on to investigated the analysis of gaseous or volatile substances using sensor gas chromatography equipped with ...
DetectorsChromatographApplication of Gas ChromatographyBasic Gas ChromatographyThermo Fisher SciTime-of-Flight MaGlobal gas chromatography marketImportance of chromatography in drugColumnsAnalysisMarket for gas chromatographyDetectionHigh resolution chromatographyDetectorChromatographicFast Gas ChromatographyDimensional gas chromatographyHydrocarbonSolid-Phase MicroextrHeadspaceCompoundsTriple quadrupoleDeterminationHeliumApplicationsMultidimensionalHydrogenQuadrupolePrinciples2018HPLCRetentionMethodsAgilent TechnologiesSearchSystemsGaseousMass spectrometerVaporIndustrial GasesCarrierInverse gasThermal DesorptionConsumablesSpectroscopyPetroleumNorth AmericaFiltersSampling techniquesSeparationChemistryCharacterize
Detectors6
- Our two SRI 8610's are rudimentary gas chromatographs that use packed columns and thermal conductivity detectors. (kutztown.edu)
- The report "Gas Chromatography Market by Instrumentation (Systems, Detectors, Autosamplers, Fraction collectors), by Consumables & Accessories (Columns, Fittings & Tubings, Flow Management), by Reagents (Analytical, Preparative) - Analysis & Global forecast to 2019" , this report studies the global gas chromatography market over the forecast period of 2014 to 2019. (pitchengine.com)
- The market for gas chromatography instrumentation is segmented into systems, detectors, auto-samplers and fraction collectors. (pitchengine.com)
- 10. Detectors for Gas Chromatography. (elsevier.com)
- For liquid and gas chromatography, our detectors are used to help multiply the input sample size in order to perform a more accurate analysis. (photonis.com)
- Select analysis software, packed or capillary gas chromatography columns, flame ionization (FID), photoionization (PID), TCD or ECD detection methods and selective or non-selective detectors. (selectscience.net)
Chromatograph20
- The insides of the GC-MS, with the column of the gas chromatograph in the oven on the right. (wikipedia.org)
- The GC-MS is composed of two major building blocks: the gas chromatograph and the mass spectrometer . (wikipedia.org)
- The gas chromatograph utilizes a capillary column which depends on the column's dimensions (length, diameter, film thickness) as well as the phase properties (e.g. 5% phenyl polysiloxane). (wikipedia.org)
- Combining the two processes reduces the possibility of error, as it is extremely unlikely that two different molecules will behave in the same way in both a gas chromatograph and a mass spectrometer. (wikipedia.org)
- This 5-day course provides a complete training solution enabling you to understand your Gas Chromatograph or GC-MS instrument, develop applications, troubleshoot & maintain it. (rsc.org)
- Ellutia has launched the 500 Series gas chromatograph at Pittcon. (foodnavigator.com)
- You will learn about the components of the gas chromatograph and the mass spectrometer, the purpose and prinicples of data analysis and the different sampling techniques that can be used. (rsc.org)
- Our new Agilent 7890B gas chromatograph is equipped with an autosampler, dual capillary columns, one flame ionization detector, and one thermal conductivity detector. (kutztown.edu)
- A HewlettPackard 5890 Series II gas chromatograph with flame ionization detector (FID) coupled to 5972 MSD quadrupole mass spectrometer was used. (scribd.com)
- A gas chromatograph (GC) is an analytical instrument that measures the content of various components in a sample. (shimadzu.com)
- The analysis performed by a gas chromatograph is called gas chromatography. (shimadzu.com)
- Watch to learn about the benefits and features of the Thermo Scientific TRACE 1300 Series Gas Chromatograph. (thermofisher.com)
- Subsequent acrylamide determination was made by gas chromatography with electron capture detection using a Traco 560 gas chromatograph with a constant/current pulse/modulated Ni63 electron capture detector and a Hall 700-A electrolytic conductivity detector. (cdc.gov)
- The heart of the system was an HNU Systems model 301 gas chromatograph fitted with a flame ionization detector (FID) or electron capture detector (ECD). (cdc.gov)
- German physical chemist Erika Cremer in 1947 together with Austrian graduate student Fritz Prior developed the theoretical foundations of GC and built the first liquid-gas chromatograph, but her work was deemed irrelevant and was ignored for a long time. (wikipedia.org)
- A gas chromatograph is a chemical analysis instrument for separating chemicals in a complex sample. (wikipedia.org)
- SIS supplies products for your gas chromatograph. (sisweb.com)
- It maximizes throughput with the fastest injection-to-injection time of any conventional gas chromatograph. (selectscience.net)
- The leachate samples were analyzed on an Agilent Technologies 6890N Gas Chromatograph with electron capture in a# AB002 Column 30.0 m × 250 μm × 0.25 μm calibrated, 25 psi pressure, flow 2.9 ml/min, temperature 25 ° C, ultra-high purity Helium as the entrainment gas and an elution time of 50 min. (scirp.org)
- This gas chromatograph is constructed of corrosion resistant alloys or otherwise treated to minimize degradation. (shimadzu.com)
Application of Gas Chromatography1
- Possibilities for further application of gas chromatography in the analysis of xenon compounds and in the determination of certain physicochemical parameters are pointed out. (srce.hr)
Basic Gas Chromatography5
- McNair, Harold M. is the author of 'Basic Gas Chromatography', published 2009 under ISBN 9780470439548 and ISBN 0470439548. (valorebooks.com)
- Since the publication of the highly successful first edition of Basic Gas Chromatography , the practice of chromatography has undergone several notable developments. (barnesandnoble.com)
- Basic Gas Chromatography, Second Edition covers the latest in the field, giving readers the most up-to-date guide available, while maintaining the first edition's practical, applied approach to the subject and its accessibility to a wide range of readers. (barnesandnoble.com)
- Along with these new and updated topics, the references, resources, and Web sites in Basic Gas Chromatography have been revised to reflect the state of the field. (barnesandnoble.com)
- Concise and fundamental in its coverage, Basic Gas Chromatography, Second Edition remains the standard handbook for everyone from undergraduates studying analytical chemistry to working industrial chemists. (barnesandnoble.com)
Thermo Fisher Sci1
- Thermo Fisher Scientific Inc., the world leader in serving science, has announced that it will host an informative seminar on the latest advances and applications for its vast range of gas chromatographic products for the environmental laboratory, culminating with the TSQ Quantum GC. (environmental-expert.com)
Time-of-Flight Ma2
- This residue was then analyzed using pyrolysis-comprehensive two dimensional gas chromatography with time-of-flight mass spectrometry. (sae.org)
- Harvath, P., Reidy, S., and Byer, J., "Identification of Organic Acids in Used Engine Oil Residues by Pyrolysis-Comprehensive 2D Gas Chromatography-Time of Flight Mass Spectrometry," SAE Technical Paper 2016-01-2274, 2016, https://doi.org/10.4271/2016-01-2274 . (sae.org)
Global gas chromatography market4
- The systems segment accounted for the largest share of the global Gas Chromatography Market in 2016. (prnewswire.com)
- The columns segment accounted for the largest share of the global Gas Chromatography Market in 2016. (prnewswire.com)
- In 2016, the oil and gas industry segment commanded the largest share of the global Gas Chromatography Market. (prnewswire.com)
- The global gas chromatography market is dominated by North America, followed by Europe, Asia, and the Rest of the World (RoW). (pitchengine.com)
Importance of chromatography in drug2
- Growth in this market can be attributed to the increasing crude & shale oil production, increasing importance of waste water treatment, rising adoption of GC-MS, initiatives to reduce environmental pollution levels, growing food safety concerns, and increased importance of chromatography in drug testing. (prnewswire.com)
- Increased importance of chromatography in drug approvals is likely to drive the growth of this market. (pitchengine.com)
Columns7
- The large share of this segment can primarily be attributed to factors such as the availability of improved gas chromatography columns for the petroleum industry and the discovery of new oil fields. (prnewswire.com)
- Phenomenex has opened a manufacturing and development facility to produce its gas chromatography (GC) columns. (foodnavigator.com)
- Agilent Technologies has introduced InfinityLab - a product family of liquid chromatography instruments, columns and supplies - at Analytica 2016 in Munich. (foodnavigator.com)
- Phenomenex Inc., a global leader in the research and manufacture of advanced technologies for the separation sciences, announces the opening of a new manufacturing and development facility dedicated to the company's gas chromatography (GC) columns, marketed under the Zebron™ brand name. (environmental-expert.com)
- The 2017/18 Waters Quality Parts, Chromatography Columns and Supplies Catalog is available! (waters.com)
- Access the latest version of our Chromatography Columns and Consumables Catalog to ensure that you're optimizing your applications! (thermofisher.com)
- Flow of Gases through Chromatographic Columns. (elsevier.com)
Analysis40
- Like liquid chromatography-mass spectrometry , it allows analysis and detection even of tiny amounts of a substance. (wikipedia.org)
- Independent experts providing training and consultancy in the analytical science fields of Gas Chromatography, Liquid Chromatography, Mass Spectrometry, Spectroscopy, Mass Spectrometry Imaging, Physical & Structural Properties of Molecules, Thermal Analysis and all their related techniques. (rsc.org)
- Ultra-fast gas chromatography means analysis cycle times are decreasing so the time to prepare the samples to be analysed is becoming the limiting factor, according to an instrument provider. (foodnavigator.com)
- Improve gas quality and optimize GC analysis with easy-to-use Thermo Scientific™ Super Clean™ Gas Cartridge Filters. (fishersci.com)
- Knowledge of gas chromatography applied to gas analysis and refined products is expected. (rigzone.com)
- GC-MS is ideal for the analysis of inorganic gases and aromatic solvents, detection of impurities and allergens in cosmetics. (news-medical.net)
- Gas Chromatography coupled with Mass Spectrometry is a widely used technique for the analysis and quantification of organic compounds. (uclouvain.be)
- However, the data collection software associated with this GC is powerful, and provides all the necessary tools to transfer knowledge of chromatography data analysis to more sophisticated systems. (kutztown.edu)
- Agilent Technologies Inc. (NYSE: A) today introduced a headspace instrument for gas chromatography (GC) sample analysis, the 7697A Headspace Sampler. (environmental-expert.com)
- Samygin VM, Zykin LF, Stepanov VM, Stepin AA, Korsakova II (1994) A gas chromatographic analysis of the fatty acid composition of Yersinia pestis . (springer.com)
- Chromatography has evolved over the years and become a method of choice for analysis, identification, and purification of a wide variety of compounds. (pitchengine.com)
- Shimadzu Corporation, a leading manufacturer of analytical and medical instruments, announces the release of a trace moisture analysis system utilizing a gas chromatography method. (environmental-expert.com)
- Middle distillates analysis with 2-dimensional gas chromatography. (intertek.com)
- 2-dimensional gas chromatography (GCXGC) analysis measures the hydrocarbon composition of middle distillates. (intertek.com)
- 2-dimensional gas chromatography analysis (2D-GC) of middle distillates allows refineries to better control reactions in different sections of facilities during the refining process. (intertek.com)
- 2-dimensional gas chromatography analysis is available globally. (intertek.com)
- Fast Gas Chromatography with Tandem Mass Spectrometry Analysis of. (ingentaconnect.com)
- A form of normal phase chromatography that is used for the analysis and purification of low to moderate molecular weight, thermally labile molecules. (contractpharma.com)
- 11. Qualitative Analysis by Gas Chromatography. (elsevier.com)
- 13. Quantitative Analysis by Gas Chromatography. (elsevier.com)
- Here is an invaluable new book on quantitative gas chromatography which explains how the method can - or should - be used for accurate and precise analysis. (elsevier.com)
- Gas chromatography is firmly established as one of the few major methods for the quantitative analysis of complex mixtures. (elsevier.com)
- This book provides a complete discussion of all the problems involved in the achievement of quantitative analysis by gas chromatography, whether in the research laboratory, in the routine analysis laboratory or in process control. (elsevier.com)
- Our portfolio of gas analysis applications is broad, deep, and can provide you with the information you need to meet your specific lab requirements. (perkinelmer.com)
- Although many food components are involatile or thermally labile and therefore not suitable for analysis by gas chromatography, other components are volatile and this technique is the preferred analytical method. (waterstones.com)
- Developments in methods of derivati- zation, injector design and column technology have also extended the applicability of gas chromatography to the analysis of relatively involatile compounds. (waterstones.com)
- Analysis of complex mixtures of vapors in ambient air by fast-gas chromatography. (cdc.gov)
- Liquid and Gas Chromatography Mass Spectrometers (LC/GC MS) are used for various types of testing including drug testing, environmental analysis, and molecular biology. (photonis.com)
- Analysis tools like SWOT analysis and Porter's five force model have been provided to present a perfect in-depth knowledge about gas chromatography detector market. (benzinga.com)
- The book begins by covering the basic principles of both gas chromatography (GC) and mass spectrometry (MS) to the extent necessary to understand and deal with the data generated in a GC-MS analysis. (researchandmarkets.com)
- Inverse gas chromatography is a physical characterization analytical technique that is used in the analysis of the surfaces of solids. (wikipedia.org)
- Analysis of aromatic compounds in the New Zealand manuka honey was carried out by solid phase microextraction followed by gas chromatography-mass spectrometry. (hindawi.com)
- For example, switching to hydrogen carrier gas generation eliminates the costs of carrier-gas cylinders and can yield faster speeds of analysis if hydrogen is not already in use, but the change also invokes some new safety requirements and procedures. (chromatographyonline.com)
- Identification of 18 mycobacterial species was performed by analysis of profiles obtained by using gas-liquid chromatography. (asm.org)
- Along this thesis were presented several application of Bayesian statistics in gas-chromatographic data analysis. (uva.nl)
- Quality control monitoring analysis and original pattern recognition studies involving coupled chromatography were presented in this thesis. (bl.uk)
- MODEL BIO GENE BTI-GCN-5890 is widely used for the analysis of oil extraction and refining, petrochemical, fine chemical, food safety, environmental protection, electronic high-purity gas industry, scientific research institutes, QC, safety supervision, public security forensic and national security and so on. (biotechnologiesinc.com)
- Apparatus and method for on-line coupled liquid chromatography and gas chromatography analysis includes a retention gap which allows injection of a substantial volume of sample-carrying eluent and concentrates bands, obviating adverse effects on the resolution or peak shape of the components of interest. (patentgenius.com)
- A major challenge to analysis of chlorine gas is the corrosive nature of chlorine, which is a strong oxidizer and will corrode system components. (shimadzu.com)
- From drug discovery and pharmaceutical development to food safety and environmental analysis, Phenomenex chromatography solutions accelerate science and help researchers improve global health and wellbeing. (marketwired.com)
Market for gas chromatography1
- Germany is the leading market for gas chromatography systems in Europe, projected to grow at CAGR of 5.4% during the period from 2013 to 2018. (pitchengine.com)
Detection5
- Gas chromatography-mass spectrometry (GC-MS) is a hybrid analytical technique that couples the separation capabilities of GC with the detection properties of MS to provide a higher efficiency of sample analyses. (news-medical.net)
- The exceptions are for certain fixed-gas separations as well as for some detection methods, such as helium ionization detection (HID) and electron-capture detection (ECD), in which helium actively participates in the detection chemistry. (chromatographyonline.com)
- Gas Chromatography (GC) is an analytical separations technique composed of injection, pump, column and detection components. (selectscience.net)
- vaporizing the species of interest, and delivering the species to the gas chromatography column to effect separation thereof for detection and recordation. (patentgenius.com)
- Medina-Armenta, L. , Cruz-Jiménez, G. , Teutli-León, M. , de la Rosa, L. and Feria-Reyes, R. (2017) Pesticides Recovery and Detection from Agricultural Soil Leachates Using Gas Chromatography Masses with Electron Capture Detector. (scirp.org)
High resolution chromatography2
- It produces high resolution chromatography in a very reliable manner. (phenomenex.com)
- On-Line Multidimensional Chromatography Using Packed Capillary Liquid Chromatography and Capillary Gas Chromatography," J. of High Resolution Chromatography & Chromatography Communications, (1985), vol. 8, 469-474. (patentgenius.com)
Detector18
- The mass spectrometry process normally requires a very pure sample while gas chromatography using a traditional detector (e.g. (wikipedia.org)
- The Thermal Conductivity Detector (TCD) is commonly used in Gas Chromatography because it detects almost all organic and inorganic compounds unlike FID. (uclouvain.be)
- There is a stable flow of heat from the filament to the body of the detector when the carrier gas passes alone. (uclouvain.be)
- A simple GC would include a tank of gas, pressure and flow regulators to control the gas flow, an oven, an injector to allow injection of a small volume of the sample mixture under pressure, a column containing the bed of stationary phase, a detector to detect the presence of components as they exit the column, and some means to record the detector signal. (kutztown.edu)
- SupraSolv ECD and FID is specially developed for gas chromatography in combination with ECD (Electron Capture Detetor) and FID (Flame Ionization detector). (sigmaaldrich.com)
- The glass or metal column through which the gas phase passes is located in an oven where the temperature of the gas can be controlled and the eluent coming off the column is monitored by a computerized detector. (wikipedia.org)
- The popularity of gas chromatography quickly rose after the development of the flame ionization detector. (wikipedia.org)
- New York City, NY: June 30, 2020 - Published via (Wired Release) -Recent Research and Future Market Potential of Gas Chromatography Detector Market in Global Industry. (benzinga.com)
- The prime objective of the report is to offer updates and information related to future opportunities in the global gas chromatography detector market witness robust expansion throughout the forecast period 2020-2029. (benzinga.com)
- This report is exhaustive quantitative analyses of the gas chromatography detector industry and provides data for making strategies to increase market growth and effectiveness. (benzinga.com)
- According to this latest publication from Market.us Research, Gas Chromatography Detector are used in applications across diverse industry verticals. (benzinga.com)
- The growing reluctance towards the usage of gas chromatography detector in Biotechnological & Pharmaceutical Industries, Food & Beverage Industries, Academic Research institutes, Hospitals/Clinics, Cosmetics Industries will have a huge impact on market growth. (benzinga.com)
- The report encompasses several factors that have contributed to the growth of the gas chromatography detector market in recent years. (benzinga.com)
- Among all factors, the increasing number of Biotechnological & Pharmaceutical Industries for gas chromatography detector will have a positive impact on the growth of the market. (benzinga.com)
- In a bid to establishing a stronghold in the market, several companies are looking to acquire long term Biotechnological & Pharmaceutical Industries to enhance their market share in the gas chromatography detector market. (benzinga.com)
- The cost of detector-quality cylinder air is much lower than carrier-grade helium, but its 'burn rate' is much higher at over 400 mL/min compared to a range of 50-250 mL/min for carrier gas with a split inlet system. (chromatographyonline.com)
- Environics Gas Mixers, Dilutors and Dividers have been the used in laboratories for over twenty years for applications including gas chromatography-mass spectrometry (GC-MS), GC with Flame Ionization Detector (GC-FID) , and GC with thermal conductivity detector (GC-TCD). (environics.com)
- The air is a perfect method for generating zero reference calibration gas, ultra-pure combustion air for flame ionization detector, service air for pneumatically operated valves, hydrocarbon free chromatography use and general laboratory use. (environics.com)
Chromatographic11
- The drop exiting from the lower open end of the tube is instantaneously vaporized, and the carrier gas or eluting gas carries the vaporized sample out of the bore and toward a chromatographic column. (google.com)
- More particularly, the invention pertains to a device for delivering a reproducible calibrated volume of a liquid sample into a carrier gas stream wherein the liquid is flash vaporized and flushed by the carrier gas stream into a gas chromatographic apparatus. (google.com)
- The vaporized sample is of course swept by the carrier gas (eluting gas) from the evaporation point or point of vaporization to the chromatographic column. (google.com)
- A still further object is to provide novel apparatus satisfactory for precise automatic sampling of a liquid process stream containing high boiling and reactive materials, flash vaporization of the sample, and flushing such vaporized sample into a gas chromatographic apparatus. (google.com)
- The sample is injected into the GC inlet where it is vaporized and eluted on a chromatographic column by the carrier gas, generally helium. (uclouvain.be)
- The gas chromatography market has seen an extraordinary amount of technological advancements in the last few years, as companies have introduced new systems that perform chromatographic procedures in a lesser amount of time and provide more detailed results. (pitchengine.com)
- Gas Chromatographic Instrumentation. (elsevier.com)
- Capillary gas chromatographic and gas chromatographic--mass spectrometric methods were employed for profiling total fatty acid content of human erythrocyte membranes. (nih.gov)
- By using gas-liquid chromatographic profiles alone, 58% of specimens were correctly identified to species level, and an additional 41% were correctly identified to a group of two or three organisms. (asm.org)
- A commercially available, computer-assisted microbial identification system (MIS) employs gas-liquid chromatographic analyses of bacterial fatty acids. (asm.org)
- ISO 22854:2008 specifies the gas chromatographic (GC) method for the determination of saturated, olefinic and aromatic hydrocarbons in automotive motor gasoline. (iso.org)
Fast Gas Chromatography1
- Fast gas chromatography (GC) as a method of separating and analyzing complex mixtures of organic vapors in ambient air was evaluated. (cdc.gov)
Dimensional gas chromatography5
- SepSolve Analytical claims its flow modulator for routine two-dimensional gas chromatography (GC×GC) analyses will broaden uptake of the technique. (foodnavigator.com)
- Shimadzu Scientific Instruments' new Multi-Dimensional Gas Chromatography system (MDGC) expands the capabilities of chemists who perform target compound analyses in complex sample matrices, including natural product extracts, food and flavor components, and biological extracts. (environmental-expert.com)
- 2-Dimensional gas chromatography provides a greater amount of information about the composition of middle distillates when compared to conventional gas chromatography. (intertek.com)
- This review deals with overview of methods of multidimensional gas chromatography (MDGC), the classical meaning- conventional heart-cut MDGC, and the comprehensive two-dimensional gas chromatography (GC×GC). (degruyter.com)
- MDGC is widely used because it increases required separation efficiency, which cannot be achieved by one-dimensional gas chromatography. (degruyter.com)
Hydrocarbon3
- We are seeking a Hydrocarbon Gas Chromatography Specialist to join the Technical Services Division of our Research & Development Center. (rigzone.com)
- Your primary role is to participate in the chromatography lab in support of the gas and petroleum hydrocarbon characterization team, develop analytical methods, mentor young scientists, and interact with proponents to solve their analytical and operational challenges through the available resources. (rigzone.com)
- Hydrocarbon Group-Type Analyses by On-Line Multi-Dimensional Chromatography," J. of Chromatography, 279 (1983), 139-144. (patentgenius.com)
Solid-Phase Microextr1
- The volatile compounds in Roselle extract and dried samples were performed using needles of solid phase microextraction (SPME) and gas chromatography/mass spectrometry (GC/MS HP-5890). (scribd.com)
Headspace1
- 4. You can choose automatic/manual gas six-way valve injector, headspace injector, thermal desorption injector, cracking furnace injector, methane conversion furnace and auto-injector. (biotechnologiesinc.com)
Compounds10
- The sample flows through the column and the compounds of the mixture of interest are separated thanks to their relative interaction with the stationary phase (coating of the column) and the mobile phase (carrier gas). (uclouvain.be)
- Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. (wikipedia.org)
- In preparative chromatography, GC can be used to prepare pure compounds from a mixture. (wikipedia.org)
- Gas chromatography is the process of separating compounds in a mixture by injecting a gaseous or liquid sample into a mobile phase, typically called the carrier gas, and passing the gas through a stationary phase. (wikipedia.org)
- I have done research on food sterilization with active oxygen, stable standards for liquid chromatography-mass spectrometry, the determination of metals by inductively coupled plasma-mass spectrometry, and the determination of volatile organic compounds by gas chromatography-mass spectrometry US EPA indoor radon. (forensisgroup.com)
- A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds. (harvard.edu)
- Gas Chromatography of Volatile Xenon Compounds. (srce.hr)
- 1969). 'Gas Chromatography of Volatile Xenon Compounds. (srce.hr)
- Zado FM, Fabečić J, Žemva B, Slivnik J. Gas Chromatography of Volatile Xenon Compounds. (srce.hr)
- A library of 139,963 chemical compounds analyzed by gas chromatography, including 447,285 GC method and retention index citations from literature. (sisweb.com)
Triple quadrupole1
- Vidal, J. L. M., Liébanas, F. J. A., Rodríguez, M. J. G., Frenich, A. G. and Moreno, J. L. F. (2006), Validation of a gas chromatography/triple quadrupole mass spectrometry based method for the quantification of pesticides in food commodities. (wiley.com)
Determination4
- Determination of acrylamide in nerve tissue homogenates by electron-capture gas chromatography. (cdc.gov)
- Covers the determination of chemical composition of natural gas and similar gaseous mixtures within list in table below. (scribd.com)
- Determination of Trace Chlorinated Benzenes in Fuel Oil by On-Line Multidimensional Chromatography Using Packed-Capillary Liquid Chromatography and Capillary Gas Chromatography," J. of Chromatography, 349 (1985), 55-61. (patentgenius.com)
- Inverse gas chromatography was successfully used for the determination of Hansen solubility parameters (HSPs), as well as other surface parameters. (witpress.com)
Helium9
- Agilent Technologies Inc. introduces the new Hydrogen Sensor for the 7890B Gas Chromatography system, which helps GC users move away from costly helium. (manufacturing.net)
- new sensor helps GC users move away from costly helium carrier gas by providing the additional level of security many organizations require in order to use hydrogen. (manufacturing.net)
- Helium or nitrogen is used as the so-called carrier gas. (shimadzu.com)
- The mobile phase is usually an inert gas or an unreactive gas such as helium, argon, nitrogen or hydrogen. (wikipedia.org)
- The benefits of zero future gas cylinder costs plus no cylinder transport or demurrage charges yield an attractive return on investment (ROI), especially given the current high cost of carrier-grade helium. (chromatographyonline.com)
- For the majority of GC applications, hydrogen carrier gas can be substituted for helium. (chromatographyonline.com)
- Even in these cases, it is sometimes possible to apply helium as the makeup gas while using hydrogen as carrier gas, which at least will reduce helium consumption. (chromatographyonline.com)
- As an alternative, most ECD systems will work with a 5% methane in argon makeup gas mixture, although sensitivities and relative responses will change compared to helium. (chromatographyonline.com)
- Components sometimes associated with natural gases, i.e., helium, hydrogen sulfide, carbon monoxide and hydrogen are excluded from the main body of the method. (scribd.com)
Applications6
- Whatman™ HEPA-Vent Filters are ideal for air and gas filtration applications where high retention, dirt-holding capacity and flow rates are required. (fishersci.com)
- Training of technicians and junior scientists in gas chromatography operation and applications. (rigzone.com)
- This 1-day course provides an introduction for complete beginners to gas chromatography and GC-MS, explaining the principles of the technique and the industries and their applications of these techniques. (rsc.org)
- This book provides detailed gas chromatography information to applications of biochemi. (intechopen.com)
- This book provides detailed gas chromatography information to applications of biochemicals, narcotics and essential oils. (intechopen.com)
- This guide should be certainly valuable to the novice, as well as to the experienced gas chromatography user who may not have the enough experience about the specific applications covered in this book. (intechopen.com)
Multidimensional3
- Multidimensional gas c. (degruyter.com)
- Fundamental Principles of Multidimensional Chromatography. (barnesandnoble.com)
- On-Line Multidimensional Chromatography Using Micro HPLC and Capillary GC," Chromatography Forum, Nov.-Dec. (1986), 29-34. (patentgenius.com)
Hydrogen7
- Agilent Technologies Inc. introduced the new Hydrogen Sensor for the 7890B Gas Chromatography system. (manufacturing.net)
- Hydrogen was used as the carrier gas with the FID, and hydrogen or argon containing 5% methane was the carrier gas used with the ECD. (cdc.gov)
- Researcher using a gas chromatography mass spectrometer in the NREL (National Renewable Energy Laboratory) Hydrogen Laboratory, Colorado, USA. (sciencephoto.com)
- Installing carrier- and flame-gas generators is relatively easy, although there are some special considerations for hydrogen. (chromatographyonline.com)
- Generation of hydrogen for carrier and fuel gas invokes some additional concerns. (chromatographyonline.com)
- For standard GC separations with FID, hydrogen carrier is an attractive choice because the same hydrogen source also can be used for the FID fuel gas. (chromatographyonline.com)
- Gas generators including air, nitrogen and hydrogen by Parker/Balston. (sisweb.com)
Quadrupole1
- [5] By 1966 Finnigan and collaborator Mike Uthe's EAI division had sold over 500 quadrupole residual gas-analyzer instruments. (wikipedia.org)
Principles1
- The simplicity of these instruments allows students to grasp the operating principles of gas chromatography without a lot of automation. (kutztown.edu)
20184
- The global gas chromatography systems market is expected to grow at a CAGR of about 5.7% from 2013-2018, projected to reach $847.2 million by 2018. (pitchengine.com)
- North America is the leading gas chromatography systems market, projected to grow with a CAGR of 5.8% from 2013 to 2018. (pitchengine.com)
- The Asian gas chromatography systems market is projected to grow at a CAGR of 6.1% to reach $192.3 million by 2018. (pitchengine.com)
- Identification of TPO blooming products after environmental exposure by Fourier-transform infrared (FTIR) & gas chromatography coupled to mass spectrometry(GC-MS)," SAE Technical Paper 2018-36-0063, 2018, https://doi.org/10.4271/2018-36-0063 . (sae.org)
HPLC1
- These experts opine in cases that concern hair testing procedures , such as gas chromatography mass-spectrometry (GCMS) , high pressure liquid chromatography (HPLC), mass spectrometry, gas chromatography (GC), thin layer chromatography (TLC), and ultraviolent (UV) methods. (forensisgroup.com)
Retention7
- The Thermodynamics of Retention in Gas Chromatography. (elsevier.com)
- Other parameters that can be used to alter the order or time of retention are the carrier gas flow rate, column length and the temperature. (wikipedia.org)
- Measuring how the retention time changes as a function of probe molecule chemistry, probe molecule size, probe molecule concentration, column temperature, or carrier gas flow rate can elucidate a wide range of physico-chemical properties of the solid under investigation. (wikipedia.org)
- Record partial pressure & operate gas sampling valve to place sample onto column, record chromatogram, peak areas & peak retention times. (scribd.com)
- K. Grob, Jr., "Band Broadening in Space" and the `Retention Gap` in Capillary Gas Chromatography, J. of Chromatography, 237 (1982), 15-23. (patentgenius.com)
- Some Technical Aspects of the Preparation of a `Retention Gap` in Capillary Gas Chromatography," J. of Chromatography, 244 (1982), 185-196. (patentgenius.com)
- The retention gap is used to simultaneously receive and vaporize liquid solvent in a manner highly suitable for purposes of gas chromatographically separating solutes of interest dispersed in the liquid chromatography solvent. (patentgenius.com)
Methods1
- For comparing the results from 2D-GC gas chromatography, standardized methods such as DIN EN 12916 (aromatic distribution in diesel fuels), ASTM D 2887 (simulated distillation), DIN EN 14078 (FAME-content) as well as DIN EN 14331 (methyl ester distribution in FAME-blends) can be consulted. (intertek.com)
Agilent Technologies4
- Agilent Technologies has opened a $14.7m technology centerin Folsom, California to expand capabilities for chromatography consumables and hardware. (foodnavigator.com)
- Agilent Technologies has added to its line of gas chromatographs saying it makes complex technology easy to use. (foodnavigator.com)
- Agilent Technologies, Inc., (NYSE: A) today introduced the Agilent CrossLab supplies portfolio, providing high-quality supplies for major brands of gas chromatography systems. (environmental-expert.com)
- Agilent Technologies, Inc. (NYSE: A) today introduced the Agilent LTM Series II system for gas chromatography, the second generation of its proprietary low thermal-mass technology that greatly increases sample throughput using faster column heating/cooling cycles. (environmental-expert.com)
Search1
- The drop exiting from the of Search 0C, lower open end of the tube is instantaneously vapor- 23/230 232 253 219/273 ized, and the carrier gas or eluting gas carries the vaporized sample out of the bore and toward a chro- {561 kefereme Clled matographic column. (google.com)
Systems14
- SCION Instruments has set its sights on tailoring the capabilities of gas chromatography systems to meet specific analytical requirements. (foodnavigator.com)
- Here you will find gas filters, injection port accessories, GC-specific syringes, tools, tubing and GC sample handling products such as derivatization systems and vials and closures. (thermofisher.com)
- This report analyzes the worldwide markets for Gas Chromatography Systems in US$ Million/Thousand by the following End-use Segments: Chemical & Pharmaceutical, Clinical Labs, Environmental Labs, Petrochemicals, Agriculture & Food & Beverage, Research, and Others. (marketpublishers.com)
- When it comes to flexibility, ease of use and sensitivity, one family of gas chromatography (GC) systems stands apart: Clarus. (perkinelmer.com)
- Increasing collaborations and symposiums on chromatography technologies have also helped in the increased use of gas chromatography systems, further propelling the growth of this market. (pitchengine.com)
- The demand for gas chromatography systems is expected to increase in future, due to recent advances in biotechnology and pharmaceutical researches and rise in government funding for the chromatography-based researches. (pitchengine.com)
- The gas chromatography systems market growth is also assisted by increasing conferences and symposiums on chromatography technologies. (pitchengine.com)
- Rise in venture capital funding in the U.S. is further supporting the growth of gas chromatography systems market. (pitchengine.com)
- The European gas chromatography systems market is mainly driven by strict emphasis on drug and food safety and quality and rise in venture capital funding and investments. (pitchengine.com)
- Similarly, increasing collaborations and agreements are assisting the growth of European gas chromatography systems market. (pitchengine.com)
- Japan in the Asian gas chromatography systems market had the highest share of 35.34% in the year 2013. (pitchengine.com)
- Our systems can produce gas concentrations from percent to ppb levels at the required flow rates for single or multi-point calibration. (environics.com)
- Environics' systems automatically blend and dilute gases to generate precise gas mixes. (environics.com)
- The Chromera® Chromatography Data Systems (CDS) combines powerful functionality with unmatched ease of use for more streamlined data handling. (selectscience.net)
Gaseous1
- In gas chromatography (GC), the gaseous mobile phase is forced through the stationary phase using pressure. (kutztown.edu)
Mass spectrometer1
- The first on-line coupling of gas chromatography to a mass spectrometer was reported in 1959. (wikipedia.org)
Vapor5
- Gas chromatography is also sometimes known as vapor-phase chromatography (VPC), or gas-liquid partition chromatography (GLPC). (wikipedia.org)
- In gas chromatography, the sample vapor passes through the column and separates into its components - a separation that is governed by the distribution between the mobile and stationary phase. (chromatographyonline.com)
- In IGC the roles of the stationary (solid) and mobile (gas or vapor) phases are inverted from traditional analytical gas chromatography (GC). (wikipedia.org)
- In IGC, a single gas or vapor (probe molecule) is injected into a column packed with the solid sample under investigation. (wikipedia.org)
- During an IGC experiment a pulse or constant concentration of a known gas or vapor (probe molecule) is injected down the column at a fixed carrier gas flow rate. (wikipedia.org)
Industrial Gases1
- Chlorine is a widely used component in a variety of industrial and manufacturing processes, ranging from industrial gases to disinfectants to common polymers such as polyvinyl chloride (PVC). (shimadzu.com)
Carrier9
- The drop exiting from the lower open end of the tube is instantaneously vaporized, and the carrier gas or eluting. (google.com)
- A further object is to provide novel apparatus for the transfer of a calibrated volume from a liquid process stream to a position in a carrier gas stream wherein the liquid is flash vaporized and flushed by the carrier gas stream into a gas chromatography column. (google.com)
- Two of the four filaments are swept by the carrier gas and the other two by a flow containing the sample. (uclouvain.be)
- A process by which the components of a mixture are separated by volatilizing the sample into a carrier gas stream and passing the gas through a column containing a substance that retains (absorbs) and releases the volatile constituents. (contractpharma.com)
- As the carrier gas transports the analyte molecules through the column, there is adsorption of the analyte molecules either onto the column walls or onto packing materials (stationary phase) in the column to give separation. (wikipedia.org)
- The carrier gas then either sweeps the entirety (splitless mode) or a portion (split mode) of the sample into the column. (wikipedia.org)
- The degree of separation between the sample and the stationary phase is determined by flow rate, the nature of the stationary phase, the surface area exposed to the carrier gas, and the column temperature. (chromatographyonline.com)
- Carrier-gas consumption can be reduced by up to 80-90% if a gas-saver pressure-control mode turns off split flow while the inlet is not actively in use. (chromatographyonline.com)
- The result is that much more FID air is used in the average laboratory than carrier gas. (chromatographyonline.com)
Inverse gas4
- This study used inverse gas chromatography to investigate the effect of different polymers on the surfirce energy of partially or fully coated white pine wood meal. (usda.gov)
- Inverse gas chromatography or IGC is a highly sensitive and versatile gas phase technique developed over 40 years ago to study the surface and bulk properties of particulate and fibrous materials. (wikipedia.org)
- In such a case, the use of inverse gas chromatography is suggested. (witpress.com)
- Surface ability of lignin materials to various types of interaction might be also expressed by means of inverse gas chromatography derived surface parameters, including its heterogeneity. (witpress.com)
Thermal Desorption1
- It handles and processes the gas chromatography samples automatically using a process called thermal desorption. (sciencephoto.com)
Consumables1
- The Gas Chromatography Market is segmented on the basis of instruments, accessories and consumables, end users, and regions. (prnewswire.com)
Spectroscopy1
- This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. (scielo.br)
Petroleum1
- Publication records demonstrating your chromatography skills applied to the petroleum industry are an added value. (rigzone.com)
North America1
- In fact, North America and Europe combined account for nearly two-thirds of the worldwide gas chromatography demand. (chromatographyonline.com)
Filters3
- Eliminate contamination from your gas source for optimal GC performance with the easy-to-use Thermo Scientific™ Click-On™ Inline Gas Filters. (fishersci.com)
- Whatman™ Polycap™ Disposable Capsules, 36 TF filters organic and aggressive solutions, air and gas. (fishersci.com)
- GC gas purifiers and filters for purifying GC and MS gas includes moisture, particulate, oxygen and hydro-carbon filters. (sisweb.com)
Sampling techniques1
- This course provides the essential and practical theory about all available GC & GC-MS techniques, covering gases and plumbing, sampling techniques, how to choose the GC & GC-MS techniques for an application, how to set-up the instrument, strategies for method development & method optimisation and how to maintain & troubleshoot the instrument, techniques and method. (rsc.org)
Separation4
- This is fueling the demand for separation services and gas chromatography in this region. (pitchengine.com)
- Principle of gas chromatography: The sample solution injected into the instrument enters a gas stream which transports the sample into a separation tube known as the 'column. (shimadzu.com)
- Gas chromatography (GC) is an analytical separation technique in which the mobile phase is a gas. (chemgapedia.de)
- Gas chromatography describe s the group of analytical separation techniques used to analyze volatile substances in the gas phase. (forensisgroup.com)
Chemistry1
- Gas Chromatography involves the study of various vaporizable molecules in chemistry and the other related research fields. (intechopen.com)
Characterize2
- Perform advanced testing using gas chromatography techniques to characterize various oil and gas industrial samples in compliance with international standards where available. (rigzone.com)
- In GC, a standard column is used to separate and characterize several gases and/or vapors. (wikipedia.org)