BRAINCAKEGas Chromatography
Gas chromatography (GC) separates mixtures of volatile substances: liquids or gases that can be vaporised without decomposing.
The stationary phase is inside a long, thin column, coiled to fit inside an oven. The column is packed with a solid, or with a solid coated with a liquid. The mobile phase is an unreactive carrier gas such as nitrogen or helium, which flows through the column under pressure at high temperature.
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More in Chromatography
- Chromatography
- Thin-Layer Chromatography
- Rf Values
- Column Chromatography
- Retention Times
- Combining Chromatography with Mass Spectrometry
All 7 lessons in Chromatography · All AQA A-level Chemistry topics