[Question] New Zealand — has anyone got a straight answer on certificate of analysis
Long-ish post, sorry. tl;dr at the bottom.
I have been tracking COA against eGFR for 33 weeks because I could not find anyone who had. The correlation is weaker than I expected, which is itself mildly interesting given how confidently people link the two in here.
Caveats up front: one person, one lab, one assay, no control, and I changed my training in the middle of it, which was stupid.
tl;dr: probably real, definitely smaller than the threads imply, and not worth reorganising your week around.
best — the order this archive was captured in
Inter-lab variance on this kind of assay is routinely 1–2 points. Different column, different gradient, different integration.
PDF metadata is checkable in fifteen seconds
This is the correct framing. The COA structure matters as much as the number.
Water content on the document? That affects your concentration math.
You have restated the marketing copy. What is the actual substance here.
PDF metadata is checkable in fifteen seconds
PDF metadata is checkable in fifteen seconds
Adding to this: COA is doing more work than the comment implies.
no "is this good?" without saying what the compound and claimed purity are
What is the method line say? Not the technique, the actual method.
PDF metadata is checkable in fifteen seconds
Not to be pedantic but area percent and related substances are being used interchangeably and they are not interchangeable in real life.
Not to be pedantic but area percent and related substances are being used interchangeably and they are not interchangeable in real life.
Disagree on that part. 98.7% and 98.3% on the same vial is normal.
Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.
redact your own name, not the vendor's batch details
post the whole document, not the headline number
the counterion is part of the mass you paid for
Slight fix: the number was 97.6, not 97.4. Decimal point, but a fairly consequential one.
- 1You have restated the marketing copy. What is the actual substance here.14 comments in this branch · started by u/emeka_chowdhury
- 2Inter-lab variance on this kind of assay is routinely 1–2 points. Different…4 comments in this branch · started by u/teodor_lokken