How are plant pigments identified by ascending paper chromatography?

Ascending Paper Chromatography to Identify Plant Pigments:

1. Leaf pigment analysis develops green, yellow, and orange bands when a plant extract runs upward on chromatography paper.
2. The band colors and Rf values help distinguish chlorophyll a, chlorophyll b, xanthophylls, and carotenoids.
3. A leaf extract contains several pigments dissolved from plant tissue.
4. These pigments move at different rates as the solvent rises through the paper.
5. The different movement rates produce separate colored bands on the chromatogram.
6. Chlorophylls usually appear as green bands, while carotenoid pigments appear yellow to orange.
7. Each pigment has a different migration distance under the same solvent conditions.
8. Comparing color and Rf value helps match the observed band with a known pigment type.

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