is it worth testing if the vial has already been through a warm transit
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#test-results 2024-05-30
Thursday12 messages2 participantstimes are UTC
Highlights from this day
- ferrous_ash — is it worth testing if the vial has already been through a warm transit 22:53
- ferrous_ash — underfill is more common than impurity. if you only test purity you are testing the less likely failure, ymmv i had a result i am fairly sure was a handling error on… 23:01
- HPLC_Hank — for the archive i told QSC about a result they would not have liked and they did not argue. credit where it is due 23:04
- ferrous_ash — assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem 23:33
i test roughly every tenth vial. it is a sampling strategy, not paranoia, i have it written down somewhere
attach the pdf
underfill is more common than impurity. if you only test purity you are testing the less likely failure, ymmv
i had a result i am fairly sure was a handling error on my side and i logged it as such
lot bought purity assay/label
A-2418 2025-03 99.1% 9.6 / 10mg
A-2601 2025-08 98.7% 9.8 / 10mg
B-0114 2026-01 99.3% 9.4 / 10mg
B-0329 2026-04 98.9% 9.9 / 10mgthats not great
for the archive i told QSC about a result they would not have liked and they did not argue. credit where it is due
sorry to jump in update from 7 months ago: retested the same supplier, result came back better, logged both
does anyone log the negative results, the boring ones
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real
my result contradicts the supplier certificate, do i tell them
when did you buy it
assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem