genuine question is area percent the same thing as how many mg are in the vial
#coa-reading 2025-11-26
Wednesday15 messages4 participantstimes are UTC
Highlights from this day
- pioneer_pia — quick one if you only read one line on a certificate, read the lot number. if you read two, read the assay, still working it out 21:43
- ferritin_fay — the retention time on this one is different from the last lot, problem i asked SGN for the method and they sent it. that alone put them ahead of most 22:12
- pioneer_pia — the certificate from WWB is the one i use to teach this because it actually has a populated impurity table 22:22
- tokyo_taper — i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019 22:28
no lot no certificate
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purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions
check the lot
quick one if you only read one line on a certificate, read the lot number. if you read two, read the assay, still working it out
thats a tell
thats the counterion
the retention time on this one is different from the last lot, problem
i asked SGN for the method and they sent it. that alone put them ahead of most
lot bought purity assay/label
A-2418 2025-03 99.1% 9.6 / 10mg
A-2601 2025-08 98.7% 9.8 / 10mg
B-0114 2026-01 99.3% 9.4 / 10mg
B-0329 2026-04 98.9% 9.9 / 10mg👍2✅17
test it yourself
the three way match is vial, certificate, invoice. if all three agree you have something
the certificate from WWB is the one i use to teach this because it actually has a populated impurity table
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the paperwork can be perfect and the vial can still be light. weigh it
looks re-dated
i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019
lot-log.csv
511 rows · not retained in the public archive
water content is why an honest 10mg vial assays at 9.1. karl fischer titration, and most certificates omit it