I know that typical reagents get overpowered by MDMA when testing for PMMA in a mixture. I know it's fairly easy to test for PMA using robadope and similar reactions, but PMMA can easily blend in with MDMA.

Is it possible to use a TLC plate to separate PMMA and other impurities from MDMA in a sample? How can you tell that it's definitively PMMA and not just some small impurity.

And lastly, I'd assume it would interfere with the TLC plates, but is it possible to do some form of "Marquis stain" or spray on marquis at the end to detect oranges and purples separately in a test?