[Lab] QSC BPC — Janoshik came back 98.7% against a claimed 98.5%
Posting this because the title is the whole finding — QSC BPC — Janoshik came back 98.7% against a claimed 98.5% — and a number without its method is a rumour. 98.7% and 98.5% — those are the numbers, and they are the ones I am willing to defend. Started keeping a folder of every certificate I have been sent. The…
Left up and flaired Explainer. This is the answer we keep linking, written properly.
redact your own name, never the batch details
That is the catalogue certificate rather than the batch-specific one. Same layout, completely different status.
Small fix — 214nm, not 280nm. It matters here because the impurity you are asking about barely absorbs at the longer wavelength.
Batch number and date of analysis, are both on there?
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net peptide content and purity are two different numbers on the same vial
the lot on the vial has to match the lot on the page
That is not what the method line says. It names the technique; it does not certify the operator.
My first certificate had a compound name, a percentage and a logo. I thought that was normal. It is not, and now I know what to ask for.