three years of certificate of analysis threads, summarised so you do not have to read them
Right, the purity question again, but with numbers this time. I have 24 data points over 10 weeks. The pattern is consistent enough that I do not think it is chance, and boring enough that nobody is going to screenshot it, which is usually a good sign. The thing I would flag for anyone new: the effect I am describing…
Did they give you the chromatogram or just the summary line?
area% is not mass%, and here is exactly why it matters
area% is not mass%, and here is exactly why it matters
Yes, exactly this, and it is the bit that took me 53 weeks to accept.
purity and net content are two different numbers, same vial
no "is this good?" without saying what the compound and claimed purity are
area% is not mass%, and here is exactly why it matters
Batch number and date of analysis? Both are load-bearing.
chromatogram or it did not happen
Not to be pedantic but certificate of analysis and COA are being used interchangeably and they are not interchangeable in real life.