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CBSE Class 9 Answered

how to separate coloured components from blue ink....???and what is chromatagraghy..???????
Asked by Saloni Bansal | 03 Jul, 2013, 11:23: PM
answered-by-expert Expert Answer
Chromatography is a method for analyzing complex mixtures (such as ink) by separating them into the chemicals from which they are made. Chromatography was first used to separate pigments (colors) in leaves, berries, and natural dyes.
Coloured components can be separated from blue ink by paper chromatography. In paper chromatography, the solid surface is the cellulose fibers in the chromatography paper.  A solvent or developer (water, alcohol, or acetone) is placed in the bottom of the chromatography chamber. The paper acts as a wick to pull the solvent up the paper. The solvent front will "wick" up the chromatography paper by capillary action.  A minute drop of the ink is placed near the bottom of the strip of chromatography paper, but slightly above the level of the solvent in the chamber. As the solvent passes over the drop of ink, the components of the ink dissolve in the solvent. Because the components of the ink do not all dissolve at the same rate, as the components of the mixture move upward, they show up as colored streaks.
Answered by | 04 Jul, 2013, 08:57: AM

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