Recent content by ontogenesis

Whatman .2 filter with Buchner funnel, vacuum filtration erlenmeyer flask, vacuum pump. Easiest to knock out over 1 L in an hour.

That could be one of many issues.. Firstly, those concentrations are very high - which lab is producing these? You could almost assume they would be under dosed which my reflect the sterility of the product. Besides that, it sounds like your gear isn't completely sterile or it is missing a...