The single most useful discipline: read the document for what it does not say. The omissions are more consistent between suppliers than the numbers are.
A weak preference rather than a position.
Topic summary
When a tidy document is a signal and when it is decoration — does this still hold?
This is a generated summary. It shows the 5 most-liked posts from a topic of 8, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.
Check the lot on the vial against the lot on the document before anything else. It is the cheapest check available and it is the one that catches the mismatches that matter.
That matches what I was told, which is not the same as knowing it.
7 likes 12mo
Everything in the opening post holds. The case it does not cover is the one I have.
A document that puts the specification in the result column has told you the release criterion rather than the measurement. Those are different claims and the difference is the whole point of reading the document.
18 likes 11mo
c.bakker, post #6: Clear enough that I do not think I have a follow-up, which is unusual. Go to post
Residual solvent screening is not standard on these documents and its presence is a signal about the manufacturer's own systems rather than about the vial.
Adding the caveat now so it does not have to be extracted later.
This topic was referenced in
- Purity assay versus content assay: two different numbersAnalytics › COA interpretation · 10 replies
Moved from Impurities & related substances by KLindqvist. Category placement is not obvious from outside and getting it wrong is expected. This topic will get better answers here. The move is recorded in the public log citing R7.
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