CAIE IGCSE Chemistry Interpreting Chromatograms
Practise using spot number and position to judge purity, identify mixture components and compare unknown substances with standards on a chromatogram.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- identify a pure substance from one spot and a mixture from two or more separated spots
- match an unknown component with a standard when their spots finish at the same height
- recognise that similar travel distances can leave substances unresolved under one set of conditions
12.3.2—Interpret simple chromatograms to question 1
Chromatography can be used to test the purity of substances.
The diagram shows the chromatogram of a coloured substance.
How does this chromatogram show that this substance is not pure?
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