the water content question that gets asked weekly, answered properly
Posting this as a discussion rather than a claim: the water content question that gets asked weekly, answered properly. Why the same vial can honestly produce three different numbers. Purity by area percent is relative to what the detector saw on one gradient at one wavelength. Net peptide content subtracts…
HPLC-UV and LC-MS answer different questions
Agreed — the itemised related substances table is the difference between a document and a receipt.
post the whole document, not the headline number
Agreed — the itemised related substances table is the difference between a document and a receipt.
This is the sentence to take away. The rest of the thread is footnotes to it.
The document I was worried about turned out to be a re-issue with a later creation date. Asked, got the original, entirely ordinary.
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.
Yes — and the reason to ask for the whole page is that the interesting parts are the ones people crop out to fit a screenshot.