someone explain COA to me like I have not read a paper in years
The title is the whole question — someone explain COA to me like I have not read a paper in years — but here is why I am asking. The PDF creation date being later than the analysis date is usually a re-issue or a re-export. It is worth one question and it is not evidence of anything on its own. Ask what the stability…
chromatogram or it did not happen
chromatogram or it did not happen
This is the sentence to take away. The rest of the thread is footnotes to it.
area% is not mass%, and the difference is the whole game
Are the related substances itemised or is it a single total?
The document I was worried about turned out to be a re-issue with a later creation date. Asked, got the original, entirely ordinary.
Batch number and date of analysis, are both on there?
net peptide content and purity are two different numbers on the same vial
the counterion is part of the mass you paid for
Asked for the storage condition behind the stability statement. Got it in a sentence. It is a two-line email and almost nobody sends it.