Hi.
SWIM did a extraction of some nonsuper gakked ephedrine pills, extracted with MeOH/IPA, boiled servael times in NP and one final acetone boil. Now SWIM had 12g ephedrine, he tried to burn a little sampel on some foil, after the ephedrine was evap, a little "something" was left on he foil
Ups thougt SWIM, the ephedrine isn't 99% pure, but almost. SWIM did a
keyplunkning, but out of the 12g., SWIM only got 3,5g return
In the meantime, SWIM had performed another extraction from the pills, crushed the pills, boiled 3 times in Xylene and once in acetone. Dried and extracted with dry and hot IPA.
SWIM took a little ephedrine from the "keyplunking batch" and did the foil test. Only a discoloured stain was left. He tried to do the same with the new extracted ephedrine, again a little "something" was left.
SWIM don't wanna lose all his ephedrine again, doing a/b. Is there a easiere way to removed the last tiny dirty piceces from the ephedrine powder? How much will gakk affect the reaction in LWR?