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Chemical AnalysisHigher Tier

Higher Tier: Other Types of Chromatography

Part of Chromatography — GCSE Chemistry

This higher tier covers Higher Tier: Other Types of Chromatography within Chromatography for GCSE Chemistry. Revise Chromatography in Chemical Analysis for GCSE Chemistry with 20 exam-style questions and 15 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 10 of 13 in this topic. This section is most useful once the core foundation idea is secure, because it adds the detail that pushes answers higher.

Topic position

Section 10 of 13

Practice

20 questions

Recall

15 flashcards

🎓 Higher Tier: Other Types of Chromatography

Thin Layer Chromatography (TLC)

  • Stationary phase: Thin layer of silica gel on glass/plastic plate
  • Advantages: Faster, better resolution than paper chromatography
  • Uses: Drug analysis, pharmaceutical quality control

Gas Chromatography (GC)

  • Mobile phase: Inert gas (helium or nitrogen) carried through a heated column
  • Stationary phase: Liquid coating inside a long, coiled tube
  • Uses: Analysing volatile compounds, forensic analysis, breathalyser tests
  • Advantage: Extremely sensitive — can detect parts per billion

All chromatography types share the same principle: components separate because of different affinities for the mobile and stationary phases.

Keep building this topic

Read this section alongside the surrounding pages in Chromatography. That gives you the full topic sequence instead of a single isolated revision point.

Memory AidExam FocusThe Science Behind Solving CrimesWhat is Chromatography?

Practice Questions for Chromatography

What is the purpose of chromatography?

  • A. To separate the components of a mixture
  • B. To measure the mass of a substance
  • C. To change a substance from a solid to a liquid
  • D. To make a substance more concentrated
1 markfoundation

Explain how a chromatogram can be used to determine whether a substance is pure or a mixture.

3 marksstandard

Quick Recall Flashcards

What does Rf stand for and what does it measure?
Rf = Retention factor. It measures how far a substance travels compared to the solvent (distance moved by substance ÷ distance moved by solvent)
What is chromatography?
A separation technique used to separate mixtures into their individual components based on different affinities for mobile and stationary phases

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