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choice of QC's concentrations

Posted: Thu Nov 30, 2006 1:32 pm
by dipols
How should the concentrations for QC samples be chosen? Is it ok if they are identical with calibrator concentrations? All I could find on this topic from FDA was that low QC must be within 3x from LLOQ.
I see that in literature typically QC's concentrations are different from calibrators. What's the rationale behind that?

Posted: Fri Dec 08, 2006 3:51 am
by tom jupille
I don't think it matters much. Take the attitude that "everything that is not forbidden is permitted". :wink: