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How does the reference standard error propagate into my content figure?

Asked 27 Jun 2025Modified 13 months agoViewed 19k times
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I am comparing a supplier certificate against an independent result on the same lot.

I have worked this out and I would like someone to find the error, because I suspect there is one.

My working so far, for the record, is below, and I am fairly sure the error is in the unit conversion rather than the algebra.

Is my approach right even if my number is wrong?

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askedivo_paunovic16k2727 Jun 2025
Is this purity or content? The question reads as though the two are the same measurement. – m_haraldsen 4 months ago
What does the certificate say about the lot code, and does it match the vial? – label_claim 3 months ago
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Ask PeptideStack is a static archive. Posting is closed, but the norms are worth stating: answer the question that was asked, show your working, cite the trial or the certificate, and say plainly where the evidence runs out.

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