which lab
#test-results 2025-09-28
Sunday20 messages5 participantstimes are UTC
Highlights from this day
- ms_ms_mira — my sheet has 9 lots from Homopeptide with a spread under a point, which is tight 09:55
- assay_not_purity — quantity testing is usually a separate line item and it is the one worth paying for 10:03
- LC_MS_Lena — if the vial has been through a bad transit you are testing the transit as much as the supplier quantity testing is usually a separate line item and it is the one… 10:17
- food_noise_off — log the boring results too. a channel that only records failures produces a false picture 12:29
- impersonator_ip — i told SGN about a result they would not have liked and they did not argue. credit where it is due 14:01
underfill is more common than impurity. if you only test purity you are testing the less likely failure
my sheet has 9 lots from Homopeptide with a spread under a point, which is tight
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern
quantity testing is usually a separate line item and it is the one worth paying for
📈11📉6🧊1
test it again
posting my Janoshik result on lot SG-1177, what do people make of it
if the vial has been through a bad transit you are testing the transit as much as the supplier
quantity testing is usually a separate line item and it is the one worth paying for
does a bad result on one lot condemn the whole supplier
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real, i think
thats not great
how many lots do you need before you can say anything about a supplier
assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem
log the lot number
💀9
while im here the widest spread in my data is about 2.6 percentage points across five lots from one supplier, thats just me
my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
i had a result i am fairly sure was a handling error on my side and i logged it as such
log the boring results too. a channel that only records failures produces a false picture
🤝11
sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
i told SGN about a result they would not have liked and they did not argue. credit where it is due