#test-results 2026-01-13

test it again

assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem

underfill is more common than impurity. if you only test purity you are testing the less likely failure
if the vial has been through a bad transit you are testing the transit as much as the supplier

a supplier disputing a result is rare here and it has never gone well for the supplier

is it worth testing if the vial has already been through a warm transit

post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later

whats the underfill rate people are actually seeing
a supplier disputing a result is rare here and it has never gone well for the supplier

a point or two between the certificate and an independent result is inside what two labs disagree by

my sheet has 8 lots from QSC with a spread under a point, which is tight

if you are testing to settle an argument you will not settle it with n of 1

Verification log updated: WWB — evidence added, status unchanged.

what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern

while im here the results in this channel skew because people test when they are suspicious. that is selection bias and it is real

weigh it first

nice result