why does nobody talk about test results
Asking properly rather than in a comment on somebody else’s thread: why does nobody talk about test results. Tested three lots over a year rather than three vials from one lot. Cost the same and told me something completely different. Sent a vial in specifically to check a supplier’s claim after a good experience. It…
Inter-lab variance on this assay runs roughly a point either way, driven mostly by gradient and integration. Two results inside that band agree; they do not disagree quietly.
Not convinced by the comparison. Different services, different gradients, and you are treating one as ground truth.
Batch number and date of analysis?
What was the claim on the certificate you are comparing against?
Area percent or net peptide content?
date of analysis matters as much as the number