Chromatography Forum

It was my guess that the QC lab was not tossing the guards when directed .... or that the guards were not being dedicated to specific assays as suggested.

Again, why give someone the chance to mess things up?

Granted, I am well aware of the situiations where the use of a guard is simply unavoidably and that there is a place for everything. My point is that I try to avoid the use of a guard if at all possible and practicle.

I generally don't use either guards or frits - read my first post - however for this application I think a guard may be warranted and I'm pretty certain a frit won't do the job.

My point was simply that one shouldn't blame equipment for a problem caused by people not following directions.

Best,

Chris