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Avobenzone USP monograph assay

http://www.chromforum.org/viewtopic.php?t=9414

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Avobenzone USP monograph assay

Posted: Fri Oct 24, 2008 2:27 pm
by jeputnam
Has anyone been able to intrepret the avobenzone USP monograph assay and get decent chromatography? The column phase, length, and ID are given, but not the film thickness. No flow rate is given either. The avobenzone peak fronts ridiculously badly with whatever conditions I've tried.

Posted: Fri Oct 24, 2008 3:29 pm
by Consumer Products Guy
The question might be also raised: has anyone NOT had trouble following a USP Monograph as written?
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