lot on the vial, lot on the certificate, lot on the invoice. three way match or you have nothing
Thread · #coa-reading · 2025-09-12
i had a certificate and an independent assay
Spun off from a message in #coa-reading on 2025-09-12. 13 messages, 4 participants.
The message this came from
- see_a_clinician — i had a certificate and an independent assay on the same lot come out within half a percent, which was reassuring, that is how i read it anyway 22:54
two certificates from the same supplier have an identical chromatogram, is that normal, or is the pinned answer still current
a certificate should name the method, the instrument, the column and the operator. most name none of those, saved as a pdf
morning, the gap is water and counterion
check the lot
water content is why an honest 10mg vial assays at 9.1. karl fischer titration, and most certificates omit it, others may differ
do people keep certificates as files or just look and move on, just curious really
😂3
reading a cert here and is it a red flag if the certificate is a jpeg rather than a pdf, asking for the log
i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, the table is where the information is
holding a certificate that the honest summary is that a certificate tells you what the supplier says about a lot they chose to test
size tells you nothing
i have never seen a research certificate with an endotoxin result on it. not once
re-dated is usually laziness