[Question] area percent — what am I missing here
area percent — what am I missing here. Searched first, found three threads that contradict each other, hence the post. Asked QSC for the batch-specific certificate and had the full document — batch, date, method line naming the column — inside six hours. That is now my baseline for everybody. Ask what the stability…
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.
The PDF creation date being later than the analysis date is usually a re-issue or a re-export.
laila_wojcik has the distinction right — one is a fraction of the detector signal, the other is a fraction of the mass.
Reminder: a question about a document is not an accusation about a supplier, and posts that blur the two get retitled.
a total of 0.4% tells you less than four named impurities adding to 0.6%
identity and quantity are two questions and most documents answer one
Right, and net peptide content is where the counterion and the water go. Both numbers can be honest and very different.