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Question
Compare TLC and Paper Chromatography techniques.
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Solution
| Chromatography technique | TLC | Paper chromatography |
| Principle | It is based on the principle of differential adsorption. Different solutes are adsorbed on an adsorbent to a different extent. | It is based on the continuous differential partitioning of components of a mixture between stationary and mobile phases. |
| Stationary phase | Solid (adsorbent like silica gel or alumina over a glass plate) | Liquid (water trapped in the fibres of a paper) |
| Mobile phase | Liquid (single solvent/mixture of solvents) | Liquid (single solvent/mixture of solvents) |
| Visualization of components of a mixture | Similar to TLC the coloured components are visible as coloured spots and the colourless components are observed under UV light or using a spraying agent. | |
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