building on that the certificate from QYB is the one i use to teach this because it actually has a populated impurity table, checkable is the whole point
Thread · #coa-reading · 2025-11-24
the impurity table is where the information
Spun off from a message in #coa-reading on 2025-11-24. 10 messages, 4 participants.
The message this came from
- endotoxin_ed — pedantry incoming the impurity table is where the information is. the headline purity is the least interesting number on the page, no date, no story 21:13
still uncheckable
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method, wavelength, column, gradient. a purity number without those is a number someone typed, lot specific not batch
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about the date on these purity and assay are two different questions and a certificate that answers only one is answering the easier one, that was 2024 though
the method and the wavelength being stated is the difference between a number and a claim
within half a percent
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re-dated is usually laziness
the related substances table is the interesting part. a row of "not detected" means they did not look hard
[edited]i dont think thats right, not detected means nothing
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checklist thing a manufacturer certificate is a claim by an interested party. that does not make it false, it makes it a claim, happy to be corrected by someone who runs these
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