Determination method gas chromatography mass spectrometry. Medical search. Frequent questions

METHODS: Headspace-GC/MS was employed to prepare essential oil from rhizome curcuma, with TR-5 quartz capillary column, extraction temperature 90 degrees C, hold 30 min, injection volume 1.5 mL. (unboundmedicine.com)
Method Number 1/48) and involved headspace and gas Chromatography (GC) coupled with mass spectrometry detection (MS). A recovery factor of 0.93 was applied to all results. (fsai.ie)
The regular purge and trap extraction followed by analysis with gas chromatography-mass spectrometry (GC-MS) usually involve a complicated assembly of facilities, more working space, long sample preparation time, and headspace solid-phase microextraction (SPME). (hindawi.com)
Headspace-gas chromatographic fingerprints to discriminate and classify counterfeit medicines. (sciensano.be)
The aim of this study was to apply two analytical techniques for the untargeted analysis of selected e-liquids using Headspace - Solid Phase Microextraction - Gas Chromatography - Mass Spectrometry (HS-SPME-GCMS) and Liquid Chromatography coupled with Time-of-flight Mass Spectrometry (LC-ToF-MS). A 1 cm Stableflex DVB/CAR/PDMS fiber was used in the HS-SPME-GCMS analysis, providing the pre-concentration of volatile and semi-volatiles compounds. (coresta.org)
This method employs headspace sampling using solid-phase microextraction (SPME) coupled to gas chromatography-tandem mass spectrometry to detect and quantify five monoterpenes and two sesquiterpenes in the low parts-per-trillion to low parts-per-billion range. (cdc.gov)

Trapped ion mobility spectrometry (TIMS) combined with quadrupole time of flight mass spectrometry (Q-TOF). (lu.se)

Final determination of target analytes wasperformed by isotope dilution gas chromatography high-resolution mass spectrometry GC/IDHRMS. (cdc.gov)
Determination of 3-quinuclidinyl benzilate (QNB) and its major metabolites in urine by isotope dilution gas chromatography/mass spectrometry. (cdc.gov)

ISO 27108:2010 specifies a method for the determination of the dissolved amount of selected plant treatment agents and biocide products in drinking water, ground water and surface water by solid‑phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC‑MS). The limit of determination depends on the matrix, on the specific compound to be analysed and on the sensitivity of the mass spectrometer. (iso.org)
Parameters such as paper size, and paper position relative to the mass spectrometer inlet were evaluated. (springer.com)
The analyses were performed in selected ion monitoring mode on a linear ion trap mass spectrometer. (springer.com)
The prevalent methods are carried out on gas chromatography-mass spectrometer, regardless of the water or fish flesh. (hindawi.com)
It involves the use of a vapour phase dehydrogenation micro‐reactor (Cu, 300°C) located between the chromatographic column and the mass spectrometer or between the injection port and the column. (rudn.ru)
and be analyzed in the gas chromatograph-mass spectrometer. (chinesestandard.net)
The mass spectrometer operated in scan mode, monitoring a range of 35-400 m/z. (coresta.org)
This sensitive and robust triple quadrupole mass spectrometer is used for analysis of low (ppb) levels of environmental compounds and biomarkers. (lu.se)

Methods are mainly based on gas chromatography and (tandem) mass spectrometry, high performance liquid chromatography as well as atomic absorption spectroscopy. (dguv.de)
Multi-residue method for the determination of pesticides and pesticide metabolites in honeybees by liquid and gas chromatography coupled with tandem mass spectrometry-Honeybee poisoning incidents, Journal of Chromatography A (2016). (phys.org)
The authors have focused on extraction and cleanup procedures, in order to develop and optimize more fully automated and miniaturized methods, including solid-phase extraction, solid-phase microextraction, microwave-assisted extraction, and on-line tandem liquid chromatography (LC/LC) trace enrichment, among others. (nhbs.com)
An efficient and selective method for the quantitative determination of polycyclic aromatic hydrocarbons (PAHs) and their monohydroxylated metabolites (OH-PAHs) in rat brain tissue using gas chromatography tandem (triple quadrupole) mass spectrometry (GC-MS/MS) was developed and validated. (lih.lu)
The method quantifies the target analytes using solid-phase microextraction gas chromatography-tandem mass spectrometry at low parts-per-billion levels. (cdc.gov)

The high separation power and short analysis time obtained demonstrate for the first time that supercritical fluid chromatography is a fast and reliable technique for the analysis of lignin-derived phenols in complex environmental samples. (lu.se)
Alkaline cupric oxide (CuO) oxidation is one of the mostly performance supercritical fluid chromatography (UHPSFC) adopted methods for analyzing lignin in various complex using columns with sub-2 m packing can further improve environmental matrices such as soils and sediments [9]. (lu.se)
UHPSFC , ultra- pacted by other parameters, such as the addition of the mod- high performance supercritical fluid chromatography ifier and the change of the mobile phase density [20]. (lu.se)
We develop and optimize analytical methods for organic and organometallic compounds, using either liquid chromatography (UHPLC) or supercritical fluid chromatography (SFC) with MS and MS/MS characterization or quantification. (lu.se)

Three years of sample collection using both detection dogs and opportunistic methods are summarised. (researchgate.net)
Faecal sample collection rates using detection dogs were over four times higher than opportunistic methods. (researchgate.net)
The validated method is characterized by recoveries higher than 77 % for most analytes, relative standard deviations below 16 % and limits of detection between 2 pg mg −1 (HHCB) and 292 pg mg −1 (propylparaben) using 50 mg of dry hair. (ufz.de)
Detection has been optimised using large volume injection techniques (LVI) for gas chromatography - mass spectrometry (LVI-GC/MS) by means of a Programmed Temperature Vaporising (PTV) injector. (europa.eu)
This book offers a comprehensive collection of robust methods for the detection of pesticide compounds or their metabolites useful in food, environmental, and biological monitoring, and in studies of exposure via food, water, air, and the skin or lungs. (nhbs.com)
The readily reproducible methods range from gas and liquid chromatography coupled to mass spectrometry detection and other classic detectors, to capillary electrophoresis and immunochemical or radioimmunoassay methods. (nhbs.com)
This document specifies methods and principles for detection of selected congeners of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated biphenyls (PCBs) in water and wastewater using a flow immunosensor. (iteh.ai)
The analysis of rat brain samples exposed to PAH mixture (0.01-1 mg/kg, 28 days, ip) demonstrated that this method allowed the detection of 16 PAHs and 28 OH-PAHs out of the 69 analytes investigated. (lih.lu)

Marek EM, Koslitz S, Weiß T , Fartasch M, Schlüter G, Käfferlein HU, Brüning T. Quantification of N-phenyl-2-naphthylamine by gas chromatography and isotope-dilution mass spectrometry and its percutaneous absorption ex vivo under workplace conditions. (dguv.de)
A validated GC-MS method for the determination and quantification of residual solvents in counterfeit tablets and capsules. (sciensano.be)

WHO is not responsible, and does not accept any liability, for the testing of pesticides for compliance with the specifications, nor for any methods recommended and/or used for testing compliance. (who.int)
European honeybees are being poisoned with up to 57 different pesticides, according to new research published in the Journal of Chromatography A . A new method for detecting a whole range of pesticides in bees could help unravel the mystery behind the widespread decline of honeybees in recent years, and help develop an approach to saving them. (phys.org)
In the new study, researchers from the National Veterinary Research Institute in Poland have developed a method for analyzing 200 pesticides at the same time, to figure out what's really putting honeybees at risk. (phys.org)
Kiljanek and the team used a method called QuEChERS, which is currently used to detect pesticides in food. (phys.org)
Their findings revealed 57 different pesticides present in the bees-it's a toxic puzzle they hope their new method will help solve. (phys.org)
1). Considering that the potential for the use of pesticides will increase with the need for food in the future, hence, governments must manage the usage by governments via alternative methods such as cultural, biological, physical, and genetic modifications. (bvsalud.org)

This method may be applicable to other compounds not explicitly covered by ISO 27108:2010 or to other types of water. (iso.org)
This document specifies a method for the determination of alkylmercury compounds in filtered water samples by gas chromatography-mass spectrometry after phenylation and solvent extraction. (iso.org)
This method is applicable to determination of individual methylmercury (MeHg) and ethylmercury (EtHg) compounds in surface water and waste water. (iso.org)
To determine the exact origin and extend of off-flavor by these two most common compounds, methods for their determination in fish are reasonably required [ 19 ]. (hindawi.com)
An examination of the mass spectra of alcohols and carbonyl compounds permits the determination of molecular mass, the location of hydroxyl group and the determination of branching at the β‐carbon atom. (rudn.ru)
To better elucidate characteristic compounds present in e-liquids, and monitor potential changes to a product that occur during storage or between lot preparations, the determination of untargeted analytes is a valuable tool. (coresta.org)
Each method used isotopically labelled compounds as internal standards (or a fiber performance check in the case of SPME). (coresta.org)
The new ultra-high performance super- critical fluid chromatography method was also applied for the qualitative and quantitative analysis of lignin-derived phenolic compounds obtained upon alkaline cupric oxide oxida- tion of a commercial humic acid. (lu.se)
Gas chromatography mass spectrometry is also available for the analysis of volatile compounds, as well as a state-of-the-art pipetting robot for automated sample preparation. (lu.se)
Routine work includes determination of molecular formula and accurate mass with an accuracy of ± 1 mDa of compounds with m/z up to 3000 mDa. (lu.se)

A rapid, reliable and effective method for direct determination of the inert components, manufacturing by-products of the pesticide, and active ingredient in two malathion formulations has been established using capillary gas chromatography-mass spectrometry (GC-MS) with the internal standard method. (cdc.gov)

Simultaneous gas chromatographic-mass spectrometric quantitation of the alkylbenzene inert components, pesticide manufacturing by-products and active ingredient in two malathion formulations. (cdc.gov)
A validated Ultra High Pressure Liquid Chromatographic method for the characterisation of confiscated illegal slimming products containing anorexics. (sciensano.be)
Unless otherwise is specified, the reagents used in this Method are all chromatographic pure (or analytically pure that has been redistilled). (chinesestandard.net)
5.3.1 Gas chromatography reference conditions a) Chromatographic column. (chinesestandard.net)
Ethyl Glucuronide (ETG) Rapid Test is an immuno-chromatographic assay for the qualitative determination of the presence of Ethyl Glucuronide (ETG). (hematologyanalyzerreagent.com)
Gas- liquid chromatographic analysis, atomic absorption spectrophotometric analysis, and sulfur-nitrogen determinations are recommended as the most useful of the techniques investigated. (cdc.gov)

In this work, a method with easier sample preparation, fewer and simplified facilities, and without SPME on GC-MS analysis is developed for the determination of 2-MIB and GSM in fish samples. (hindawi.com)
This method is suitable for large-scale determination of 2-MIB and GSM in fish samples, owing to the use of simple facility and easy-to-operate procedure, rapid sample preparation, and shorter time for GC-MS analysis without SPME. (hindawi.com)

The analytical method is described in Jones et al, 2012, which is a modification of the method described by Sjodin et al. (cdc.gov)
An analytical method utilizing chemical ionization gas chromatography-mass spectrometry was developed for the simultaneous determination of cyanide and thiocyanate in plasma. (sdstate.edu)
An analytical method for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in the mainstream of narghile smoke is presented. (who.int)

Six crude oil samples were analyzed to evaluate gas- liquid chromatography, atomic absorption spectrophotometry, infrared spectroscopy, sulfur and nitrogen determinations, mass spectrometry, nuclear magnetic resonance spectroscopy, and ultraviolet spectrophotometry. (cdc.gov)

Extraction recoveries were 85.2% for AM, 90.9% for MA, 76.5% for MDA, 84.1% for MDMA and 63.6% for MDEA. (erowid.org)
Unlike previous methods, solvent extract from samples, QuEChERS-based cleanup, and solid-phase extraction for concentration are applied. (hindawi.com)
This document specifies practical methods and procedures for sampling, extraction, clean-up, measurement in a flow immunosensor, data processing and validation of measurement results. (iteh.ai)

The method can be applied to samples containing 0,1 µg/l to 10 µg/l. (iso.org)
Both methods were applied to outdoor samplings with similar results, while indoor samples were taken by diffusive sampling. (edpsciences.org)
The method can be applied to samples containing 0,2 μg/l to 10 μg/l of each compound as mercury mass. (iso.org)
In the MEC, these methods include performing blind split samples collected during "dry run" sessions. (cdc.gov)
Particular focus is on the development of validated and quality controlled analytical methods for the determination of hazardous substances, their metabolites or their interaction products with macromolecules in blood and urine samples of humans. (dguv.de)
A sensitive and specific gas chromatography-mass spectrometry (GC-MS) method for the determination of amphetamine (AM), methamphetamine (MA), methylenedioxyamphetamine (MDA), methylenedioxymethamphetamine (MDMA) and methylenedioxyethylamphetamine (MDEA) in whole blood was designed, using the respective pentadeuterated analogs of the analytes as internal standards (I.S.). After alkalinisation of blood samples, the amphetamines were extracted using diethyl ether, derivatized with heptafluorobutyric anhydride, then purified by successive washings with deionized water and 4% NH4OH. (erowid.org)
This method is for determination of steroids and hormones in multi-media environmental samples by high resolution gas chromatography combined with high resolution mass spectrometry (HRGC/HRMS). (caslab.com)
Application of this method for incurred fish samples demonstrated acceptable analytical performance. (hindawi.com)
Environmental: No method is available for detecting BZ in environmental samples. (cdc.gov)
The cost per sample varies considerably depending on the method used, the type of samples, if you want us to make some part of the pre-treatment, etc. (lu.se)

The method was linear from this limit up to 1000 ng/ml for all analytes, with good intra-assay precision and good intermediate precision and accuracy over these ranges. (erowid.org)
The limit of quantitation (LOQ) for the method was 1 ppb. (fsai.ie)
10) of this method were validated at 0.6 μ g/kg and 1.0 μ g/kg for both 2-MIB and GSM, which are under the sensory limit (1 μ g/kg). (hindawi.com)

Simultaneous Determination of Cyanide and Thiocyanate in Plasma by Che" by Raj K. Bhandari, Robert P. Oda et al. (sdstate.edu)
and Logue, Brian A., "Simultaneous Determination of Cyanide and Thiocyanate in Plasma by Chemical Ionization Gas Chromatography Mass-spectrometry (CI-GC-MS)" (2012). (sdstate.edu)

A paper spray ionization mass spectrometry (PSI-MS) was developed to detect and quantify bisphenol S in three different brands of thermal papers commercially available. (springer.com)
use external standard method to quantify. (chinesestandard.net)

This method is applicable to the determination of the sum of SCCPs in unfiltered surface water, ground water, drinking water and waste water using gas chromatography-mass spectrometry with electron capture negative ionization (GC-ECNI-MS). (iso.org)

Asati A, Satyanarayana GNV, Panchal S, Thakur RS, Ansari NG, Patel DK (2017) Ionic liquid based vortex assisted liquid-liquid microextraction combined with liquid chromatography mass spectrometry for the determination of bisphenols in thermal papers with the aid of response surface methodology. (springer.com)

The method is applicable to timely monitoring of selected congeners of 2,3,7,8-TCDD and 3,3',4,4',5-PeCB in water and wastewater to prioritize those for subsequent confirmatory determination. (iteh.ai)
Gas Chromatography/Mass spectrometry (GC/MS) is the preferred confirmatory method. (hematologyanalyzerreagent.com)

Chen S, Chang Q, Yin K, He Q, Deng Y, Chen B, Liu C, Wang Y, Wang L (2017) Rapid analysis of bisphenol a and its analogues in food packaging products by paper spray ionization mass spectrometry. (springer.com)

While mostly persistent organic pollutants are the center of interest, the aim of our study was to develop a method for the determination of different chemical classes of emerging pollutants (organophosphorus flame retardants, plastic additives such as phthalates, bisphenol A, insecticides, antimicrobials, preservatives and musk fragrances) in hair by gas chromatography-mass spectrometry. (ufz.de)

ISO 12010:2012 specifies a method for the quantitative determination of the sum of short-chain polychlorinated n ‑alkanes, also known as short-chain polychlorinated paraffins (SCCPs), in the carbon bond range n -C 10 to n -C 13 inclusive, in mixtures with chlorine mass fractions ("contents") between 49 % and 67 %, including approximately 6 300 of approximately 8 000 congeners. (iso.org)

A method for structure determination of aliphatic alcohols within mixtures is described. (rudn.ru)
Gas-Isotope-ratio mass spectrometry (G-IRMS) allows the precise measurement of mixtures of naturally occurring light stables isotopes. (lu.se)

Analysis of orthochloronitrobenzene in Otto fuel II by high pressure liquid chromatography. (cdc.gov)
Castro G, Rodríguez I, Ramil M, Cela R (2019) Direct analysis in real time accurate mass spectrometry determination of bisphenol A in thermal printing paper. (springer.com)
Methods for UV filter analysis followed the principles of European standardized methods for pesticide residue analysis (EN 15289). (researchgate.net)
The analysis method used for the determination of benzene was an accredited method (i.e. (fsai.ie)
As the current methods are too expensive and time-consuming for routine analysis of diazinon, its trace monitoring by rapid and sensitive methods is critical to protect the environment and human health. (bvsalud.org)
The method is well suited for high-throughput analysis to aid investigations of unhealthy exposures to microbial emissions. (cdc.gov)
Methods reported for the analysis of 11 major lignin- mic substances. (lu.se)
The course covers the basics, principles and limitations for the most common methods for multivariate statistics (analysis of variance, principal component analysis and partial least squares regression), experimental design (super-saturated and factorial designs) and method validation with a focus on practical use. (lu.se)

Development of a thermal desorption-gas chromatography-mass spectrometry method for determination of styrene in air. (edpsciences.org)
A thermal desorption-gas chromatography-mass spectrometry method for determination of styrene in industrial indoor and outdoor air is presented. (edpsciences.org)
The present study proved to be practical, fast, and efficient for the direct determination of bisphenol S in thermal papers. (springer.com)

This document specifies a method for the determination of nitrate as NO3-N in water of various origin such as natural water (including groundwater, surface water and bathing water), drinking water and wastewater, in a measuring range of concentration between 0,10 mg/l and 225 mg/l of N03-N using the small-scale sealed tube method. (iteh.ai)
This Standard specifies the determination of the content and migration of phthalate esters in the food contact materials and articles. (chinesestandard.net)

The GC-MS and GC-FID techniques were employed in the determination of the pesticide residue. (scialert.net)

Potassium cyanide releases hydrogen cyanide gas, a highly toxic chemical asphyxiant that interferes with the body's ability to use oxygen. (cdc.gov)
Improvements have been achieved in chemical analytical methods for the determination of the most relevant pharmaceuticals and personal care products (PPCPs), as well as other related sewage contaminants. (europa.eu)
For identification of data for determination of whether or not dichloromethane is "toxic" under the Act, evaluations of agencies such as the International Programme on Chemical Safety (WHO, 1984) and the United States Agency for Toxic Substances and Disease Registry (ATSDR, 1989, 1991) have been consulted where available and considered to be appropriate. (canada.ca)
In addition to the Chemical Mass Balance (CMB) sampling, particulate information collected by the Montana Department of Environmental Quality is provided. (nanopdf.com)
The mass differences between isotopes leads to quantifiable kinetic- or mass dependent fractionation that is characteristic of the biological, chemical or physical history of a sample. (lu.se)

We developed a novel, high-throughput automated method for quantifying seven MVOCs (3-methylfuran, 2-hexanone, 2-heptanone, 3-octanone, 1-octen-3-ol, 2-ethyl-1-hexanol, and geosmin) in human serum. (cdc.gov)

Laboratory: basic techniques and synthetic procedures and modern spectroscopic methods of structure determination. (beloit.edu)

However, no method exists for assessing MVOC exposure by quantifying them in human serum. (cdc.gov)

Depending on the matrix, the method may also be applicable to higher concentrations after suitable dilution of the sample or reduction in sample size. (iso.org)
However, this approach was limited by low sample acquisition rates with opportunistic faecal (scat) collection methods. (researchgate.net)
Furthermore, the methodology here described showed to be a promising alternative to replace the classical methods for determination of bisphenol S, due to its simplicity, and no needing of any sample pretreatment. (springer.com)

Refer to the Laboratory Methods Files section for a detailed description of the laboratory methods used. (cdc.gov)

The PSI-MS method described here was comparable to the conventional ones, such as liquid chromatography coupled with mass spectrometry and gas chromatography coupled with mass spectrometry described in the literature. (springer.com)

Ariharan, VN , Kalirajan, K & Nagendra, PP 2015, ' Gas chromatography-mass spectrometry determination of bioactive components of three traits of Vilvam (Bael) ', Asian Journal of Pharmaceutical and Clinical Research , vol. 8, no. 2, pp. 338-342. (edu.au)

To tackle it, the bench-scale test is a cheaper and less complex method than large-scale fire simulations. (springer.com)
There are instruments or methods based on organoleptic test for the evaluation of the tainting status of off-flavors in fish [ 15 ]. (hindawi.com)
The test method will analyse the concentration of ethanol and 2-propanol by using head space gas chromatography mass spectrometry. (upm.edu.my)

A rapid, simple and reliable method using HS-GC/MS was developed to analyze 79 volatile components, which can be an alternative for quality control for TCMs such as Rhizome Curcuma. (unboundmedicine.com)
The Bureau of Mines started a continuing program to investigate and evaluate analytical techniques to assist governmental agencies to select simple, rapid, reliable methods for crude oil spill identification. (cdc.gov)

Anatomy7

Organisms7

Chemicals and Drugs69

Analytical, Diagnostic and Therapeutic Techniques and Equipment45

Phenomena and Processes28

Disciplines and Occupations5

Anthropology, Education, Sociology and Social Phenomena2

Technology, Industry, Agriculture1

Information Science5

Health Care10

Headspace6

Time-of-flight Ma1

Isotope dilution gas2

Spectrometer8

Tandem5

Supercritical fluid chromato4

Detection8

Quantification2

Pesticides6

Compounds10

Capillary1

Chromatographic6

SPME2

Analytical method3

Absorption1

Extraction3

Samples10

Limit3

Simultaneous Determination2

Quantify2

Electron1

Microextraction1

Confirmatory2

Ionization1

Insecticides1

Quantitative determination1

Mixtures2

Analysis8

Thermal3

Specifies2

Pesticide residue1

Chemical5

Geosmin1

Structure determination1

Human1

Sample3

Laboratory1

Conventional1

Journal1

Test3

Rapid2