if you buy some ecstasy, and get a testing kit, can you extract what little mdma out of the pill that is in it?
you just need a tiny piece of the pill to test it (less then 1/16'th usually)...normally pills in the same 'batch' are made with the same ingrediants (although quality control in an mdma lab isnt that great)
that brings about a new question, as dirty as X can get, would the real mdma be in a certain area of the pill, or if it was dirty, would the dirt be in EVERY 1/16th of the pill? you also missed the extraction question...
i would think not, cos if ur trying to get mdma only out of the pill, i would u think u would have to dissolfe it in a liquid and evaporate to some extent, but cos you dont know whats in the pill, u could get anything, just a thought.