Gas Chromatography

Instrument: Perkin Elmer capillary GC Clarus 500 with FID or NPD, Thermo Trace 1300

Gas chromatography is a separation science tool used mainly in analytical chemistry for the separation and analysis of compounds that can be vapourised into the gas phase.

GC is similar to liquid chromatography techniques in that compounds are passed through, and bind to the functionalised surfaces of a column. However, GC differs from LC in that an inert gas, rather than a liquid, is used to elute compounds from a GC column.

During a typical GC separation, the temperature of the GC column is gradually raised and bound components are "boiled off" the column essentially in order of their boiling points. 

Eluting components can be detected by a range of methods, including flame ionisation, thermal conductance or mass spectrometry. The result is a chromatogram in which species are typically well separated.
Technical Detail
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