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  • Advances
  • 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)
  • chromatographic
  • 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)
  • 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)
  • It is often coupled to chromatographic techniques such as gas- or liquid chromatography and has found widespread adoption in the fields of analytical chemistry and biochemistry where it can be used to identify and characterize small molecules and proteins (proteomics). (wikipedia.org)
  • GCXGC
  • Products tested by GCXGC include diesel fuels (mineral diesel, light gas oil (LGO), medium gas oil (MGO), heavy gas oil (HGO), diesel fatty acid methyl ester (FAME) blends), kerosene and synthetic diesel fuels (GTL, BTL, CTL, HVO). (intertek.com)
  • compounds
  • Replacing one of these dimensions with a two-column ensemble (for example, 1D1 + 1D2 for the 1D column), provided with a pressure tuning makeup gas between them, varies the relative retentions of compounds before the modulation step according to the junction pressure. (chromatographyonline.com)
  • First, the process of separating the compounds in a mixture is carried out between a liquid stationary phase and a gas mobile phase, whereas in column chromatography the stationary phase is a solid and the mobile phase is a liquid. (wikipedia.org)
  • The volatile compounds move into the headspace above the water and are drawn along a pressure gradient (caused by the introduction of the purge gas) out of the chamber. (wikipedia.org)
  • Nowadays in these types of samples it has been reported that over 30000 different compounds could be identified in a crude oil with this Comprehensive Chromatography Technology (CCT). (wikipedia.org)
  • Pyrolysis gas chromatography is useful for the identification of involatile compounds. (wikipedia.org)
  • Natural gas extracted from the earth also contains many low molecular weight hydrocarbon compounds such as methane, ethane, propane and butane. (wikipedia.org)
  • Both VUV spectrometers have the unique capability of providing spectral information that is both qualitative and quantitative for most gas phase compounds. (wikipedia.org)
  • temperature
  • Second, the column through which the gas phase passes is located in an oven where the temperature of the gas can be controlled, whereas column chromatography (typically) has no such temperature control. (wikipedia.org)
  • 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)
  • Using the known temperature of the sample, the bottle volume, the concentrations of gas in the headspace (as determined by GC), and Henry's law constant, the concentration of the original water sample is calculated. (wikipedia.org)
  • Methods
  • 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)
  • Five top tips for improving your gas chromatography (GC) methods. (chromatographyonline.com)
  • Instrumental methods may be used to separate samples using chromatography, electrophoresis or field flow fractionation. (wikipedia.org)
  • systems
  • When it comes to flexibility, ease of use and sensitivity, one family of gas chromatography (GC) systems stands apart: Clarus. (perkinelmer.com)
  • Bruker Gas Chromatography (GC) systems provide analysts with faster separations, increased data quality, and maximum flexibility in a range of easy-to-use and robust platforms. (environmental-expert.com)
  • SCION SQ GC-MS single quadrupole and SCION TQ GC-MS triple quadrupole systems provide analysts with a GC-MS platform especially designed for the Gas Chromatographer. (environmental-expert.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)
  • liquid
  • 5 nor- To 024w SAMPLE VAPORIZER FOR GAS CHROMATOGRAPHY This invention relates to gas chromatography, and particularly to an apparatus used for introducing samples from a liquid stream into a gas chromatography column. (google.com)
  • Automatic transfer of a sample directly from a liquid process stream into a gas chromatography column presents many problems, among which is achievement of flash vaporization of the liquid sample. (google.com)
  • Transporting the metered liquid sample to the point where it is to be vaporized is a fundamental problem in process chromatography. (google.com)
  • An object of this invention is to provide a novel liquid sample vaporizer for gas chromatography. (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)
  • Hence the full name of the procedure is "Gas-liquid chromatography", referring to the mobile and stationary phases, respectively. (wikipedia.org)
  • Gas chromatography is also sometimes known as vapor-phase chromatography (VPC), or gas-liquid partition chromatography (GLPC). (wikipedia.org)
  • Archer John Porter Martin, who was awarded the Nobel Prize for his work in developing liquid-liquid (1941) and paper (1944) chromatography, laid the foundation for the development of gas chromatography and he later produced liquid-gas chromatography (1950). (wikipedia.org)
  • IGC is a gas phase technique, thus is not subject to the above limitations of the liquid phase techniques. (wikipedia.org)
  • There is a wide variety of ionization techniques, depending on the phase (solid, liquid, gas) of the sample and the efficiency of various ionization mechanisms for the unknown species. (wikipedia.org)
  • The dipole moment of methyldiborane is 0.56 D. It has a vapour pressure of 61 mm Hg at -77.2 °C. The predicted heat of formation for the liquid is ΔH0f=-14 kcal/mol, and for the gas -9 kcal/mol. (wikipedia.org)
  • Chemicals
  • Engineers at MIT are developing a tiny sensor that could be used to detect minute quantities of hazardous gases, including toxic industrial chemicals and chemical warfare agents, much more quickly than current devices. (environmental-expert.com)
  • column
  • 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)
  • 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)
  • and thence into the gas chromatography column. (google.com)
  • Gas chromatography is in principle similar to column chromatography (as well as other forms of chromatography, such as HPLC, TLC), but has several notable differences. (wikipedia.org)
  • As the carrier gas sweeps the analyte molecules through the column, this motion is inhibited by the adsorption of the analyte molecules either onto the column walls or onto packing materials in the column. (wikipedia.org)
  • In GC, a standard column is used to separate and characterize several gases and/or vapors. (wikipedia.org)
  • quadrupole residual
  • By 1966 Finnigan and collaborator Mike Uthe's EAI division had sold over 500 quadrupole residual gas-analyzer instruments. (wikipedia.org)
  • Because of the strong market demand the EAI division was able to sell more than 500 of these quadrupole residual gas analyzers between 1964 and 1966. (wikipedia.org)
  • sample
  • United States Patent 1191 Fingerle June 17, 1975 SAMPLE VAPORIZER FOR GAS 2.972.888 2/1961 Lamkin 73/231 CHROMATOGRAPHY 3,102,512 9/1963 Broerman 122/39 3,366,149 1/1968 Taft et al. (google.com)
  • A sample of water is collected in the field in a vial without headspace and capped with a Teflon septum or crimp top to minimize the escape of volatile gases. (wikipedia.org)
  • technology
  • The Oil and Gas Industry were early adopters of the technology for the complex oil samples to determine the many different types of Hydrocarbons and its isomers. (wikipedia.org)
  • atomic
  • Thomson concluded that the neon gas was composed of atoms of two different atomic masses (neon-20 and neon-22). (wikipedia.org)
  • discharges
  • In 1886, Eugen Goldstein observed rays in gas discharges under low pressure that traveled away from the anode and through channels in a perforated cathode, opposite to the direction of negatively charged cathode rays (which travel from cathode to anode). (wikipedia.org)
  • The study of gas discharges in the mid 19th century led to the discovery of anode and cathode rays, which turned out to be positive ions and electrons. (wikipedia.org)
  • detect
  • RSKSOP-175 is an unofficial method employed by the USEPA to detect and quantify dissolved gases in water. (wikipedia.org)
  • similar
  • A high value for resolution corresponding to good separation of peaks is similar to the convention used with chromatography separations, although it is important to note that the definitions are not the same. (wikipedia.org)