. Why do you use a pencil and not a pen to mark TLC plates?

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03-02-2021
Chemistry

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. Why do you use a pencil and not a pen to mark TLC plates?

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beautifulcharm beautifulcharm · Answer 1 · 2021-02-03T06:56:08-05:00

beautifulcharm beautifulcharm

03-02-2021

Answer:

Pencil is always used to mark chromatography paper or TLC plates because ink may run and interfere with the chromatogram. ... As soon as the paper/plate is taken out, mark the solvent front with a pencil before the solvent evaporates and the front becomes impossible to see.

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