AQA 3.3.16 · OCR A 6.3.1(b)
Gas chromatography & GC–MS questions
Read chromatograms, reason from retention, combine GC with mass spectrometry and — for OCR A — work with peak integration and external calibration data.
Generated chromatography set
Use the graph and data, then mark each part. New sets change retention times, peak sizes and calculation values.
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Gas chromatography0 parts marked
AQA and OCR A are not identical here
AQA expects you to interpret retention times, understand the balance between the mobile and stationary phases, and use mass spectrometry after GC separation. OCR A also expects quantitative interpretation of peak integration and the creation and use of external calibration curves. The board switch keeps those extra OCR calculations out of the AQA set.