

Don't throw those used TLC plates away just yet!
So for more volatile samples, they will eventually evaporate. TLC is a first responder in the home chemists analysis tool kit but the cost can be a bit much for some. I have noticed that if you leave them sitting out, some of them will return to normal as the sample evaporates away. I don't remember the original use but this second run was benzaldehyde (upper spot) and 2-nitro-1-phenylpropan-1-ol (lower spot/spots).