a result without a lot number and a purchase date is an anecdote with a pdf attached
#test-results 2024-09-16
Monday29 messages6 participantstimes are UTC
Highlights from this day
- month_six_me — my sheet has 5 lots from GL Biochem with a spread under a point, which is tight 22:30
- step_one_sian — a supplier disputing a result is rare here and it has never gone well for the supplier 22:47
- area_percent — i told FGP about a result they would not have liked and they did not argue. credit where it is due 22:56
follow up do the results in this channel skew because people test when suspicious
selection bias
is a purity-only test worth the money if underfill is the common failure
quantity testing is usually a separate line item and it is the one worth paying for
test it again
✅1🎉13
certificate said 98.1 and the independent came back 96.8, is that a problem
😂1
log the lot number
my sheet has 5 lots from GL Biochem with a spread under a point, which is tight
anyone had a result they think was a lab error rather than a bad vial
update from 13 months ago: retested the same supplier, result came back better, logged both
i had a result i am fairly sure was a handling error on my side and i logged it as such
posting my Janoshik result on lot H-2814, what do people make of it
a point or two between the certificate and an independent result is inside what two labs disagree by
nice result
a supplier disputing a result is rare here and it has never gone well for the supplier
🙏3
has a supplier ever disputed a result posted here
97.4 against a certificate of 99.2 is fine. the same supplier landing low four times in a row is a question
i told FGP about a result they would not have liked and they did not argue. credit where it is due
🧪1
thats not great
one data point
log the boring results too. a channel that only records failures produces a false picture
whats the lot
📉1👍10✅5
my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
if you are testing to settle an argument you will not settle it with n of 1, ill dig out the number
is anyone tracking results over time in a way they would share
does anyone log the negative results, the boring ones
when did you buy it
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern