[Question] batch — what am I missing here
batch — what am I missing here. If this has been answered properly somewhere, link me and I will delete. Ask what the stability statement was written against — temperature, light, and whether it was the lyophilised powder or the reconstituted solution. Those are three different claims. Related substances itemised…
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.
This. Area percent answers "what fraction of what the detector saw was the peak I wanted", and people read it as "how much peptide is in the vial".
Started keeping a folder of every certificate I have been sent. The ones that itemise impurities are a small group and they are mostly the same suppliers.
ask for the storage condition the stability statement was written against
redact your own name, never the batch details
a total of 0.4% tells you less than four named impurities adding to 0.6%
a certificate with no method line is decorative
Removed — cropped document. Post the whole page or do not post it; the fields people crop are the fields that matter.
What does the method line actually say? Not the technique — the column and the gradient.