Learning objectives
Use the terms stationary phase, mobile phase, baseline, solvent front and Rf value for thin-layer chromatography, and calculate and interpret Rf values
Explain why compounds travel different distances on a TLC plate by comparing their adsorption on the stationary phase with their solubility in the mobile phase
Interpret gas–liquid chromatograms using retention times, and calculate the percentage composition of a mixture from relative peak areas
Explain why the components of a mixture leave a gas–liquid column at different times, relating retention time to how strongly each interacts with the liquid stationary phase
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