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olga55 [171]
3 years ago
10

Why should you never use a pen, but rather a pencil, to mark your starting line on a tlc plate?

Arts
1 answer:
RUDIKE [14]3 years ago
8 0
You can't use a pen because the ink will travel up the TLC plate with the TLC solvent, just like your chemical samples do.
You can only spot/label/mark TLC plates using a pencil. The graphite in a pencil will not run up the plate!
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