update from 15 months ago: retested the same supplier, result came back better, logged both
#test-results 2026-02-14
Saturday29 messages7 participantstimes are UTC
Highlights from this day
- u100_pat — log the boring results too. a channel that only records failures produces a false picture 15:48
- VialBot — Purity check: no report on file for lot C-4402. Nothing logged either way. 16:23
- u100_pat — my sheet has 6 lots from GGPeps with a spread under a point, which is tight, anyway 17:11
- luerlok — sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm 18:06
- monoisotopic — how do you separate batch variance from supplier variance 18:08
selection bias
if you are testing to settle an argument you will not settle it with n of 1
log the lot number
log the boring ones
certificate said 97.4 and the independent came back 99, is that a problem
posting my Medutest result on lot E-2205, what do people make of it
log the boring results too. a channel that only records failures produces a false picture
🤝9
underfill is more common than impurity. if you only test purity you are testing the less likely failure
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind, thats one data point
how much does sample handling on my end affect the number
Purity check: no report on file for lot C-4402. Nothing logged either way.
attach the pdf
slightly off topic but a supplier disputing a result is rare here and it has never gone well for the supplier
*Janoshik not the other one
does a bad result on one lot condemn the whole supplier
my sheet has 6 lots from GGPeps with a spread under a point, which is tight, anyway
test it again
i test roughly every tenth vial. it is a sampling strategy, not paranoia, ill dig out the number
weigh it first
post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later
thats within range
thats not great
👀16
nice result
one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally
sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
❤️1🧊9👍1
how do you separate batch variance from supplier variance
🧊1🤝7👀10
i had a result i am fairly sure was a handling error on my side and i logged it as such