how many lots do you need before you can say anything about a supplier
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#test-results 2026-04-14
Tuesday14 messages3 participantstimes are UTC
Highlights from this day
- area_percent — how many lots do you need before you can say anything about a supplier 19:38
- area_percent — assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem 20:20
- area_percent — underfill is more common than impurity. if you only test purity you are testing the less likely failure, i have it written down somewhere 20:21
- pia_plateaus — one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally, someone check my working the honest limits: hobby chain… 20:53
i have never regretted spending the money on a test. i have regretted not testing twice
post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later, your mileage will differ
for the archive update from 22 months ago: retested the same supplier, result came back better, logged both
assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem
🤝10🧪9
underfill is more common than impurity. if you only test purity you are testing the less likely failure, i have it written down somewhere
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posting my VendorInvestigate result on lot H-2814, what do people make of it
for the archive how much does sample handling on my end affect the number
a supplier disputing a result is rare here and it has never gone well for the supplier
follow up the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally, someone check my working
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
my result contradicts the supplier certificate, do i tell them
genuine question if you are testing to settle an argument you will not settle it with n of 1
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern