nice result
#test-results 2025-08-06
Wednesday22 messages6 participantstimes are UTC
Highlights from this day
- pbs_pip — underfill is more common than impurity. if you only test purity you are testing the less likely failure 11:51
- assay_not_purity — a supplier disputing a result is rare here and it has never gone well for the supplier 12:11
- assay_not_purity — one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally 13:08
which lab
update on the earlier thing what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern, still working it out
if the vial has been through a bad transit you are testing the transit as much as the supplier
i test roughly every tenth vial. it is a sampling strategy, not paranoia
thats within range
my result contradicts the supplier certificate, do i tell them
how do you separate batch variance from supplier variance
underfill is more common than impurity. if you only test purity you are testing the less likely failure
👀16⚠️1
unrelated but 98.1 against a certificate of 99.2 is fine. the same supplier landing low four times in a row is a question
log the boring ones
if you are testing to settle an argument you will not settle it with n of 1
unrelated but my vial assayed under label but the purity was fine, which matters more
if the vial has been through a bad transit you are testing the transit as much as the supplier
do the results in this channel skew because people test when suspicious
a supplier disputing a result is rare here and it has never gone well for the supplier
🧪1🧊16
coming back to this how do you post a result so it is actually useful to somebody in a year
is it worth testing if the vial has already been through a warm transit
a point or two between the certificate and an independent result is inside what two labs disagree by
thats a fill problem
one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally
🤝12⚠️7
my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
Purity check: no report on file for lot B-0329. Nothing logged either way.
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real