Don't ask how it happened, I wasn't there so I really don't know. But here is the problem.
Basically, after drying with Mag. Sulfate, about 100mls of methanol was accidently added (always label your shit). So, now swim has a solution containing DCM, ketone, and methanol.
The question is should he go ahead and wash it again, or can he just distil? Tried to look it up with TFSE, but nothing specific to this question.
GT