log the lot number
#test-results 2026-05-29
- ten_of_ten — i told QSC about a result they would not have liked and they did not argue. credit where it is due 22:25
- lisbon_lot — coming back to this my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ 22:27
- lisbon_lot — weigh the vial before you reconstitute. it costs nothing and catches the common failure 22:44
- lisbon_lot — if you are testing to settle an argument you will not settle it with n of 1 22:55
quick one the results in this channel skew because people test when they are suspicious. that is selection bias and it is real
*that should say weekly
certificate said 99 and the independent came back 99.4, is that a problem
sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
i told QSC about a result they would not have liked and they did not argue. credit where it is due
coming back to this my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
thats a fill problem
thats not great
weigh the vial before you reconstitute. it costs nothing and catches the common failure
do you test every order or sample it
which lab
if you are testing to settle an argument you will not settle it with n of 1
is a purity-only test worth the money if underfill is the common failure
[edited]how many lots do you need before you can say anything about a supplier
is quantity testing available as a separate thing or bundled
i had a result i am fairly sure was a handling error on my side and i logged it as such, i could be wrong
post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later
i have never regretted spending the money on a test. i have regretted not testing twice
a supplier disputing a result is rare here and it has never gone well for the supplier
*VendorInvestigate not the other one