gas chromatograph


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Related to gas chromatograph: mass spectrometry

gas chromatograph

[¦gas krō′mad·ə‚graf]
(analytical chemistry)
The instrument used in gas chromatography to detect volatile compounds present; also used to determine certain physical properties such as distribution or partition coefficients and adsorption isotherms, and as a preparative technique for isolating pure components or certain fractions from complex mixtures.
References in periodicals archive ?
* Failure to forecast demand for gas chromatographs
The most common gas chromatograph configuration used for natural gas custody transfer is the C6+ application.
Even though gas chromatographs and mass spectrometers are common fixtures in chemistry labs, a person trying to find the tags would have a hard time identifying the isotopically labeled compounds without knowing the code, says Isotag chemist Ken Laintz.
Mattern's team paired a gas chromatograph with an ion-trap mass spectrometer to create their pesticide residue detector.
Cofer not only analyzed combustion-gas levels in the air during the fire -- using a new helicopter-mounted gas chromatograph he developed -- but also collected additional air samples in bottles for periodic analysis over the next 21 days.
To isolate the identity the compound, he sent the reaction products through a gas chromatograph, which separates a mixture's components so that each can be further analyzed and identified without interference from the others.
The solution is then injected into a gas chromatograph, which measures the quantity of different hydrocarbons.

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