Question
Explain:
Column chromatography
Column chromatography
✓
Answer
Column Chromatography: In column chromatography an adsorbent $($e.g., $Al_2O_3)$ is packed in a glass column. The mixture to be separated or purified, taken in a suitable solvent, is applied on the top of the column. The components of the mixture get adsorbed on the column. They are then eluted out with a suitable eluent (Solvent). The weakly adsorbed component is eluted first followed by the more strongly adsorbed and so on. The method is especially suitale for such elements which are available only in minute quantities and the impurities are not very much different in their chemical behaviour from the element to be purified.
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