a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers are true and only one of them is the one you care about
#coa-reading 2025-03-01
Saturday15 messages4 participantstimes are UTC
Highlights from this day
i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does
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unrelated but one decimal versus two is usually just house style, not precision
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is area percent the same thing as how many mg are in the vial
a lab that reports "greater than 98%" rather than a number is telling you they did not integrate carefully
unrelated but is there a standard layout or does every lab do their own
[edited]a supplier certificate on its own is a starting point, not evidence. that is the whole reason the verification channel exists
i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019
the paperwork can be perfect and the vial can still be light. weigh it
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update from 3 months ago: started asking every supplier for water content and about half now include it
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why do some certificates report to one decimal and some to two
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update on the earlier thing the related substances table is the interesting part. a row of "not detected" means they did not look hard
good certificate actually
the font on this one changes halfway down, am i being paranoid
unrelated but is a supplier certificate worth anything on its own
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