anyone tested the same lot twice at different labs
#test-results 2026-03-27
Friday14 messages6 participantstimes are UTC
Highlights from this day
- LC_MS_Lena — post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later the honest limits: hobby chain of custody is weak and… 21:24
- batch_bandit — i had a result i am fairly sure was a handling error on my side and i logged it as such 21:40
- motivation_gone — sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm 22:16
thats not great
a supplier disputing a result is rare here and it has never gone well for the supplier
post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
log the boring ones
i had a result i am fairly sure was a handling error on my side and i logged it as such
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while im here how do you separate batch variance from supplier variance
whats the underfill rate people are actually seeing
anyone had a result they think was a lab error rather than a bad vial
selection bias
sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
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i have never regretted spending the money on a test. i have regretted not testing twice
quantity testing is usually a separate line item and it is the one worth paying for, from memory
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real