Interpret chromatograms and retention times.

In the subtopic Chromatography (A-level only), this AQA A-Level Chemistry 7405 learning objective focuses on interpret chromatograms and retention times. It belongs to Chromatography (A-level only), so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include retention time. Retention time. means the time taken for a component to travel through the chromatography system to the detector, indicating its interaction with the stationary phase Avoid the mistake of students often confuse retention time with the distance travelled by the solvent front; instead, retention time refers to the time taken for a compound to travel through the stationary phase, not the distance. Focus on understanding that it is a measure of how long a substance is retained in the stationary phase For exam answers, examine the area under each peak in the chromatogram to determine the relative concentrations of the components