not evidence on its own
#coa-reading 2025-10-11
Saturday21 messages4 participantstimes are UTC
Highlights from this day
- HPLC_Hank — the paperwork can be perfect and the vial can still be light. weigh it 06:02
- HPLC_Hank — nobody can authenticate a certificate from a scan. you authenticate the material by testing it yourself 06:05
- HPLC_Hank — coming back to this i have never seen a research certificate with an endotoxin result on it. not once 06:41
- HPLC_Hank — i asked GL Biochem for the method and they sent it. that alone put them ahead of most 06:50
the paperwork can be perfect and the vial can still be light. weigh it
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check the lot
nobody can authenticate a certificate from a scan. you authenticate the material by testing it yourself
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net not gross
coming back to this i have never seen a research certificate with an endotoxin result on it. not once
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good certificate actually
i asked GL Biochem for the method and they sent it. that alone put them ahead of most
is area percent the same thing as how many mg are in the vial
*VendorInvestigate not the other one
sloppy not sinister
follow up tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance
weigh the vial
a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers are true and only one of them is the one you care about
not detected means nothing
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for the archive is water content normally on a certificate or do you have to ask
i keep every certificate in a dated folder and compare them. two suppliers had not changed their template since 2019
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purity is not assay
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ok so whats the minimum a certificate has to have before you take it seriously
single wavelength detection can miss a co-eluting impurity that does not absorb there
the font on this one changes halfway down, am i being paranoid