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October 20, 2014

Homework Help: Chemistry - please help

Posted by elizabeth on Saturday, August 13, 2011 at 4:52am.

A substance was tested for Impurity A using liquid chromatography. 2 determinations were performed.
In the 1st chromatogram, Impurity A was not detected, i.e. no Impurity A peak was observed and in the 2nd chromatogram, Impurity A peak was observed with a value of 0.3%.
Is it correct to average the 2 readings to give 0.15% or should the test be repeated?

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