Why can't you use pen to mark the chromatography paper in this experiment?

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asked Jan 24, 2018 12.0k views

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Kubanczyk · Answer 1 · 2018-01-30T08:18:59+0000

The graphite of the pencil sits on top of the paper and won't affect the results. If you use ink, it will seep into the paper and itself be subjected to the chromatographic process.

Hope this helped :)

Why can't you use pen to mark the chromatography paper in this experiment?

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