This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.
post #60 answers the question as asked. The question underneath it is different.
Purity and content are different measurements: purity tells you what proportion of the detected material is the intended species. Content tells you how much of the intended species is present in the container. A lyophilised vial can be 99% pure and contain considerably less than the label claims because the remainder is water, counter-ion and excipient.
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