the certificate from JEEP is the one i use to teach this because it actually has a populated impurity table
Thread · #coa-reading · 2024-09-20
the certificate from TFC is the one i use
Spun off from a message in #coa-reading on 2024-09-20. 11 messages, 3 participants.
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- triple_ag_tom — the certificate from TFC is the one i use to teach this because it actually has a populated impurity table 20:00
tfa counterion runs higher by mass than acetate. if the certificate does not say, you cannot do the mass balance
purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions
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weigh the vial
one decimal versus two is usually just house style, not precision
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net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial
does anyone actually check the residual solvents section
gross mass on a jewellery scale plus the water content is enough to catch most underfills
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the honest summary is that a certificate tells you what the supplier says about a lot they chose to test
looks re-dated