well, imagine you have ***enough*** of quite dirty dmt and decide to run a Na2CO3-wash over it. you dissolve the goodies in ~200ml of warm naphta.
then add the na2co3-solution and the stuff instantly looks like chai with milk.
after 2 more washes and after freeze prec. resulting in a low yield you can no more block out the fact that you made a mistake. (to x-check you run an extraction over the (DIRTY) washing-solution resulting in nice crystals)
-> the washing solution instantly cooled the dmt/naphta down to the point where the dmt precipated.
obviously you begin to wonder what would be the best way to get all the dmt out of the washing-solution. add some NaOH? cool down/evaporate solution?
advice is appreciated.