Single comment threadYou are looking at one branch of genuine question about certificate of analysis that I am slightly embarrassed to ask — 53 comments in the full submission. View in context.
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genuine question about certificate of analysis that I am slightly embarrassed to ask
Something I noticed reading old threads that I have not seen said out loud. The advice on related substances in this community changed substantially around the start of last year, and nobody went back and updated the older posts. So depending on which thread the search engine hands you, you get two contradictory…
the counterion is part of the mass you paid for
the batch number or it did not happen
the batch number or it did not happen
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
Water content was 3.8%, acetate was 6.2%, purity was 99%, but net peptide was only 90% of the label weight. Perfectly honest, just chemistry.