a certificate should name the method, the instrument, the column and the operator. most name none of those
#coa-reading 2025-08-26
Tuesday14 messages5 participantstimes are UTC
Highlights from this day
- fridge_six_two — a certificate should name the method, the instrument, the column and the operator. most name none of those 21:49
- truncation_tru — the honest summary is that a certificate tells you what the supplier says about a lot they chose to test 22:12
- bengaluru_bac — i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does 22:31
- LC_MS_Lena — what does net peptide content mean next to gross mass gross mass on a jewellery scale plus the water content is enough to catch most underfills 23:00
- lot_number_lou — the three way match is vial, certificate, invoice. if all three agree you have something 23:47
good certificate actually
i have never seen a research certificate with an endotoxin result on it. not once
if the certificate date precedes the lot date, ask. sometimes it is sloppiness and sometimes it is not
the honest summary is that a certificate tells you what the supplier says about a lot they chose to test
[edited]looks re-dated
does anyone actually check the residual solvents section
two certificates from the same supplier have an identical chromatogram, is that normal
the paperwork can be perfect and the vial can still be light. weigh it
truncation_truthe honest summary is that a certificate tells you what the supplier says about a lot…
i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does
gross mass on a jewellery scale plus the water content is enough to catch most underfills
what does net peptide content mean next to gross mass
gross mass on a jewellery scale plus the water content is enough to catch most underfills
no lot no certificate
the three way match is vial, certificate, invoice. if all three agree you have something
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