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- Posts: 3475
- Joined: Mon Jan 07, 2013 8:54 pm
- Location: Western Kentucky
I have used silica gel before when analyzing PAH samples but not sure if it would remove all the acidic phenols from the full list. Likewise with Fluorosil.
As it is we sometimes need to dilute 10x or more to have good recovery on the internal standards but that can put a client out of compliance on their permits since the detection limit exceeds their regulatory limit. If only regulators understood that not all samples are as clean as DI water and not expect the same detection limits for everything.