what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern
#test-results 2025-07-14
Monday37 messages8 participantstimes are UTC
Highlights from this day
- maintenance_mo — anyone tested the same lot twice at different labs 22:59
- hk_hplc — is it worth testing if the vial has already been through a warm transit the honest limits: hobby chain of custody is weak and any result here should be read with that… 23:07
- hk_hplc — do you test every order or sample it 23:18
- hk_hplc — my sheet has 9 lots from GGPeps with a spread under a point, which is tight 23:21
- deamidation — i told HJ about a result they would not have liked and they did not argue. credit where it is due 23:41
quantity testing is usually a separate line item and it is the one worth paying for
my vial assayed under label but the purity was fine, which matters more
whats the underfill rate people are actually seeing
which lab
how do you post a result so it is actually useful to somebody in a year
anyone had a result they think was a lab error rather than a bad vial
certificate said 96.8 and the independent came back 99.2, is that a problem
is anyone tracking results over time in a way they would share
i have never regretted spending the money on a test. i have regretted not testing twice
i test roughly every tenth vial. it is a sampling strategy, not paranoia
thats a fill problem
nice result
fridge-temps.csv
155 rows · not retained in the public archive
👍5🔥2
anyone tested the same lot twice at different labs
🙏7
log the lot number
one data point
📉1🤝3🧪12
sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm, happy to be corrected
is it worth testing if the vial has already been through a warm transit
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
a supplier disputing a result is rare here and it has never gone well for the supplier
does anyone log the negative results, the boring ones
assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem, anyway
thats within range
🤝9
how many lots do you need before you can say anything about a supplier
do you test every order or sample it
❤️13
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
if the vial has been through a bad transit you are testing the transit as much as the supplier
my sheet has 9 lots from GGPeps with a spread under a point, which is tight
is quantity testing available as a separate thing or bundled
when did you buy it
update from 13 months ago: retested the same supplier, result came back better, logged both
my result contradicts the supplier certificate, do i tell them
thats not great
genuine question log the boring results too. a channel that only records failures produces a false picture
my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
i told HJ about a result they would not have liked and they did not argue. credit where it is due
sorry to jump in is a purity-only test worth the money if underfill is the common failure
weigh it first