Chromatography
What Chromatography means in Combined Science GCSE, as defined for AQA.
Definitions of Chromatography
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Reference: AQA
Separating dissolved substances using a stationary phase and a moving solvent, relying on different solubilities and therefore different distances travelled.
A technique in which coloured substances travel at different rates through paper as the solvent moves, so they separate.
A technique that can be used to separate mixtures and can give information to help identify substances.
A method that separates dissolved substances as a solvent front moves through a stationary phase.
Topics that use Chromatography
- Chromatography (AQA GCSE)
- Mixtures (AQA GCSE)
Related terms
- Separation techniques
- Chromatogram
- Crystallisation
- Distribution between phases
- filtration
- Identification by comparison
- Identification of substances
- Identification using reference values
Using Chromatography in the exam
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