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- DictionaryGas chro·ma·tog·ra·phy/ˌɡas ˌkrōməˈtäɡrəfē/
noun
- 1. chromatography employing a gas as the moving carrier medium.
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noun
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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. In preparative chromatography, GC can be used to prepare pure compounds from a mixture. Wikipedia