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Write down the principal of paper chromatograph
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The principle of paper chromatography is based on the differential movement of substances along a stationary phase (paper) due to the different rates of their migration. The stationary phase is composed of a solid support (paper) impregnated with a liquid stationary phase. The mobile phase is a liquid that moves along the paper, carrying the sample components. The rate of migration of each component depends on its solubility in the stationary and mobile phases. Components that are more soluble in the stationary phase will move more slowly than those that are more soluble in the mobile phase. This differential movement results in the separation of the components into distinct bands or spots on the paper.
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