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Gas Chromatography (GC)

Chromatography in which the sample mixture is vaporized and injected into a stream of carrier gas such as helium or nitrogen (mobile phase) which is moving through a column containing solid medium or medium coated with a relatively nonvolatile liquid (stationary phase).

The mobile phase sample is, thereby, separated into its component compounds according to the unique affinity of each compound for the stationary phase.

The components appear separately at the effluent end of the column where they can be detected and measured by density differences, thermal conductivity changes, or ionization detectors.

The detector gives a signal (in peak form) for each separated component compound; the intensity of the signal is proportional to the quantity of the compound injected, making it possible to provide a quantitative analysis by calibration.

See Also: Chromatography Liquid Chromatography Gas Chromatograph (GC) High Performance Liquid Chromatography (HPLC) Mass Spectrometry (MS) Chromatography Gas Chromatograph (GC) Mass Spectrometry (MS) Chromatography Liquid Chromatography Gas Chromatograph (GC) High Performance Liquid Chromatography (HPLC) Mass Spectrometry (MS) Contactor