does anyone keep a folder of certificates to compare over time
#coa-reading 2025-11-08
Saturday14 messages5 participantstimes are UTC
Highlights from this day
- VialBot — Testing queue: 7 submissions open, 71 awaiting dispatch. 15:58
- snac_and_water — gross mass on a jewellery scale plus the water content is enough to catch most underfills sterility and endotoxin are separate tests and almost nobody runs either on… 17:03
- snac_and_water — i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, thats one data point 17:07
- invoice_mismatch — the honest summary is that a certificate tells you what the supplier says about a lot they chose to test, i think 17:18
Testing queue: 7 submissions open, 71 awaiting dispatch.
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sterility and endotoxin are separate tests and almost nobody runs either on research material, thats just me
thats a real table
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single wavelength detection can miss a co-eluting impurity that does not absorb there
gross mass on a jewellery scale plus the water content is enough to catch most underfills
sterility and endotoxin are separate tests and almost nobody runs either on research material
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i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019
sloppy not sinister
i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, thats one data point
whats the related substances table actually telling me
[edited]the three way match is vial, certificate, invoice. if all three agree you have something
the honest summary is that a certificate tells you what the supplier says about a lot they chose to test, i think
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net not gross
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the paperwork can be perfect and the vial can still be light. weigh it