not evidence on its own
#coa-reading 2025-02-04
Tuesday20 messages4 participantstimes are UTC
Highlights from this day
- see_a_clinician — the honest summary is that a certificate tells you what the supplier says about a lot they chose to test 15:12
- see_a_clinician — certificate is dated before the lot date, is that just sloppiness 15:44
- see_a_clinician — no lot number, no certificate. a document you cannot tie to the vial in your hand is decoration, thats one data point 17:06
- VialBot — Testing queue: 6 submissions open, 129 awaiting dispatch. 17:48
- VialBot — Verification log updated: ERP — evidence added, status unchanged. 17:59
same chromatogram
i have never seen a research certificate with an endotoxin result on it. not once, ymmv
the honest summary is that a certificate tells you what the supplier says about a lot they chose to test
👍16
certificate is dated before the lot date, is that just sloppiness
🧪10⚠️3🔥11
net peptide is gross mass minus water minus counterion. that is why 11.4mg of powder can be a correct 10mg vial
📉1
tfa or acetate, how do i tell from the paperwork
i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does
sorry to jump in does anyone keep a folder of certificates to compare over time
no lot number on this certificate, does that make it worthless
check the lot
no lot number, no certificate. a document you cannot tie to the vial in your hand is decoration, thats one data point
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does purity by hplc at one wavelength miss things
Testing queue: 6 submissions open, 129 awaiting dispatch.
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sterility and endotoxin are separate tests and almost nobody runs either on research material
Verification log updated: ERP — evidence added, status unchanged.
is sterility tested as part of a normal purity certificate
why would a vial be 97.4 pure and still assay under label
quick one whats the related substances table actually telling me
net not gross