coming back after 3 months, has the pinned reading guide changed
#coa-reading 2026-05-03
Sunday14 messages6 participantstimes are UTC
Highlights from this day
- LC_MS_Lena — net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial 17:36
- osier_orders — sterility and endotoxin are separate tests and almost nobody runs either on research material 19:27
- VialBot — Testing queue: 5 submissions open, 96 awaiting dispatch. 20:33
is water content normally on a certificate or do you have to ask
thats a real table
net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial
fridge-temps.csv
732 rows · not retained in the public archive
an identical chromatogram on two different lots is the single biggest tell there is
does purity by hplc at one wavelength miss things
net not gross
sterility and endotoxin are separate tests and almost nobody runs either on research material
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certificate is dated before the lot date, is that just sloppiness
no lot no certificate
whats the related substances table actually telling me
tfa or acetate, how do i tell from the paperwork
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Testing queue: 5 submissions open, 96 awaiting dispatch.
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no lot number, no certificate. a document you cannot tie to the vial in your hand is decoration