EVERYDAY SCIENCE

Detailed explanation-1: -Qualitative information extracted from a chromatographic analysis is concerned to the identification of the compounds by comparison of the retention times of the peaks (absolute or relative) with those of the standards (if available), injected under the same instrumental conditions (Fig.

Detailed explanation-2: -A paper chromatogram can also be used to identify substances by comparing them with known substances. Two substances are likely to be the same if: they produce the same number of spots, and these match in colour. the spots travel the same distance up the paper compared to reference spots (have the same R f value)

Detailed explanation-3: -The difference between qualitative and quantitative analysis in chemistry is that qualitative analysis detects whether or not certain chemical components are present in a sample, whereas quantitative analysis determines the amount of various chemical components present in a sample.

Detailed explanation-4: -Gas chromatography (GC) can be used for both qualitative and quantitative analyses.