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TLC identification test

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TLC identification test

avatar
okara
HI,
Can any one help me out I am doing identification test of (asteroid)
by TLC according to Ph.Eur. the problem is my all the sample spots are
in the solvent front line my mobile phase 66% is ethyl acetate and 33% methylene chloride

TLC

avatar
chromatographer1
Did you dry your silica gel plate before spotting?

Do your solvents have a small amount of water?

Dry the plate and the solvents thoroughly.

Did you use the wrong plate? such as RP-TLC?
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