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Chromatography:
Three types of chromatography are routinely used in the organic chemistry teaching labs:
1.Column Chromatography
2.Thin Layer Chromatography (TLC)
3.Gas Chromatography (GC)
In these (and all types of) chromatographies, a mixture is separated by distributing the components between a stationary phase and a mobile phase. The mixture is first placed on the stationary phase (a solid or a liquid) and then the mobile phase (a gas or a liquid) is allowed to pass through the system.

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