is a purity-only test worth the money if underfill is the common failure
Thread · #test-results · 2026-04-19
does anyone log the negative results, the boring ones
Spun off from a message in #test-results on 2026-04-19. 17 messages, 5 participants.
The message this came from
- first_and_last_four — does anyone log the negative results, the boring ones 09:36
when did you buy it
weigh the vial before you reconstitute. it costs nothing and catches the common failure
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a supplier disputing a result is rare here and it has never gone well for the supplier
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what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern
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
log the boring ones
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how many lots do you need before you can say anything about a supplier
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do the results in this channel skew because people test when suspicious
one data point
anyone tested the same lot twice at different labs
my sheet has 9 lots from GL Biochem with a spread under a point, which is tight
whats the worst result anyone has logged and what happened next
underfill is more common than impurity. if you only test purity you are testing the less likely failure
how much does sample handling on my end affect the number
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test it again