Greetings,

I would like to hear from folks who conduct EPA 3640 GPC cleanup. What column do you use?

We had been using an Envirosep ABC column, but had enormous trouble obtaining a new one when the old column was trashed by some bad samples. When we finally received a new column it was bad, appears to have been improperly packed, probably exhibiting channeling, and won't pass the method calibration criteria.

I now have a low pressure glass column. Seems like a step backwards, but maybe this is really the best thing for this method, and thus my question.

What GPC cleanup column do you use?

Thanks,

Evan L. Cooper