a supplier certificate on its own is a starting point, not evidence. that is the whole reason the verification channel exists
Thread · #coa-reading · 2026-04-26
update on the earlier thing water content is why
Spun off from a message in #coa-reading on 2026-04-26. 7 messages, 4 participants.
The message this came from
- blind_submit — update on the earlier thing water content is why an honest 10mg vial assays at 9.1. karl fischer titration, and most certificates omit it 12:33
i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019
if you only read one line on a certificate, read the lot number. if you read two, read the assay
if you only read one line on a certificate, read the lot number. if you read two, read the assay
does purity by hplc at one wavelength miss things
i asked SWB for the method and they sent it. that alone put them ahead of most
whats the minimum a certificate has to have before you take it seriously