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- Gas_chromatography abstract "Gas chromatography (GC), is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture (the relative amounts of such components can also be determined). In some situations, GC may help in identifying a compound. In preparative chromatography, GC can be used to prepare pure compounds from a mixture.In gas chromatography, the mobile phase (or "moving phase") is a carrier gas, usually an inert gas such as helium or an unreactive gas such as nitrogen. The stationary phase is a microscopic layer of liquid or polymer on an inert solid support, inside a piece of glass or metal tubing called a column (an homage to the fractionating column used in distillation). The instrument used to perform gas chromatography is called a gas chromatograph (or "aerograph", "gas separator").The gaseous compounds being analyzed interact with the walls of the column, which is coated with a stationary phase. This causes each compound to elute at a different time, known as the retention time of the compound. The comparison of retention times is what gives GC its analytical usefulness.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. Firstly, 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. (Hence the full name of the procedure is "Gas–liquid chromatography", referring to the mobile and stationary phases, respectively.) Secondly, 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. Thirdly, the concentration of a compound in the gas phase is solely a function of the vapor pressure of the gas.Gas chromatography is also similar to fractional distillation, since both processes separate the components of a mixture primarily based on boiling point (or vapor pressure) differences. However, fractional distillation is typically used to separate components of a mixture on a large scale, whereas GC can be used on a much smaller scale (i.e. microscale).Gas chromatography is also sometimes known as vapor-phase chromatography (VPC), or gas–liquid partition chromatography (GLPC). These alternative names, as well as their respective abbreviations, are frequently used in scientific literature. Strictly speaking, GLPC is the most correct terminology, and is thus preferred by many authors.".
- Gas_chromatography thumbnail Gaschromatograph.jpg?width=300.
- Gas_chromatography wikiPageExternalLink Chromatographic_Columns.
- Gas_chromatography wikiPageID "596706".
- Gas_chromatography wikiPageRevisionID "602490519".
- Gas_chromatography acronym "GC".
- Gas_chromatography analytes Inorganic_compound.
- Gas_chromatography analytes Organic_compound.
- Gas_chromatography analytes "Must be volatile".
- Gas_chromatography caption "A gas chromatograph with a headspace sampler".
- Gas_chromatography classification Chromatography.
- Gas_chromatography hasPhotoCollection Gas_chromatography.
- Gas_chromatography hyphenated Gas_chromatography%E2%80%93mass_spectrometry.
- Gas_chromatography name "Gas chromatography".
- Gas_chromatography related High-performance_liquid_chromatography.
- Gas_chromatography related Thin-layer_chromatography.
- Gas_chromatography subject Category:Chromatography.
- Gas_chromatography subject Category:Gas_chromatography.
- Gas_chromatography subject Category:Laboratory_techniques.
- Gas_chromatography subject Category:Measuring_instruments.
- Gas_chromatography subject Category:Scientific_techniques.
- Gas_chromatography subject Category:Separation_processes.
- Gas_chromatography type Ability105616246.
- Gas_chromatography type Abstraction100002137.
- Gas_chromatography type Act100030358.
- Gas_chromatography type Activity100407535.
- Gas_chromatography type Analysis100634276.
- Gas_chromatography type ChemicalAnalysis100646833.
- Gas_chromatography type Cognition100023271.
- Gas_chromatography type Event100029378.
- Gas_chromatography type Investigation100633864.
- Gas_chromatography type Know-how105616786.
- Gas_chromatography type LaboratoryTechniques.
- Gas_chromatography type Method105660268.
- Gas_chromatography type Procedure101023820.
- Gas_chromatography type PsychologicalFeature100023100.
- Gas_chromatography type ScientificTechniques.
- Gas_chromatography type SeparationProcesses.
- Gas_chromatography type Technique105665146.
- Gas_chromatography type Work100575741.
- Gas_chromatography type YagoPermanentlyLocatedEntity.
- Gas_chromatography comment "Gas chromatography (GC), is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture (the relative amounts of such components can also be determined). In some situations, GC may help in identifying a compound.".
- Gas_chromatography label "Chromatografia gazowa".
- Gas_chromatography label "Chromatographie en phase gazeuse".
- Gas_chromatography label "Cromatografia gasosa".
- Gas_chromatography label "Cromatografía de gases".
- Gas_chromatography label "Gas chromatography".
- Gas_chromatography label "Gaschromatografie".
- Gas_chromatography label "Gaschromatographie".
- Gas_chromatography label "Gascromatografia".
- Gas_chromatography label "Газовая хроматография".
- Gas_chromatography label "استشراب غازي".
- Gas_chromatography label "ガスクロマトグラフィー".
- Gas_chromatography label "气相色谱法".
- Gas_chromatography sameAs Plynová_chromatografie.
- Gas_chromatography sameAs Gaschromatographie.
- Gas_chromatography sameAs Cromatografía_de_gases.
- Gas_chromatography sameAs Chromatographie_en_phase_gazeuse.
- Gas_chromatography sameAs Gascromatografia.
- Gas_chromatography sameAs ガスクロマトグラフィー.
- Gas_chromatography sameAs Gaschromatografie.
- Gas_chromatography sameAs Chromatografia_gazowa.
- Gas_chromatography sameAs Cromatografia_gasosa.
- Gas_chromatography sameAs m.02ttms.
- Gas_chromatography sameAs Q677065.
- Gas_chromatography sameAs Q677065.
- Gas_chromatography sameAs Gas_chromatography.
- Gas_chromatography wasDerivedFrom Gas_chromatography?oldid=602490519.
- Gas_chromatography depiction Gaschromatograph.jpg.
- Gas_chromatography isPrimaryTopicOf Gas_chromatography.