BRAINCAKERf Values
The position of each spot on a TLC plate is described by its Rf value (retention factor):
Rf = distance moved by component ÷ distance moved by solvent front
Both distances are measured from the baseline: to the centre of the spot, and to the solvent front line.
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More in Chromatography and Qualitative Analysis
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All 10 lessons in Chromatography and Qualitative Analysis · All OCR A-level Organic Chemistry topics