if the vial has been through a bad transit you are testing the transit as much as the supplier
#test-results 2026-03-28
Saturday18 messages7 participantstimes are UTC
Highlights from this day
- nettle_notes — a supplier disputing a result is rare here and it has never gone well for the supplier 23:16
- warsaw_vial — weigh the vial before you reconstitute. it costs nothing and catches the common failure 23:20
- wrong_network — my sheet has 8 lots from WXT with a spread under a point, which is tight 23:39
- pbs_pip — how do you separate batch variance from supplier variance update from 11 months ago: retested the same supplier, result came back better, logged both 23:54
a supplier disputing a result is rare here and it has never gone well for the supplier
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whats the worst result anyone has logged and what happened next
weigh it first
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weigh the vial before you reconstitute. it costs nothing and catches the common failure
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sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
log the boring ones
thats a fill problem
has a supplier ever disputed a result posted here
update on the earlier thing coming back after 12 months with a follow up result, where do i put it
*VendorInvestigate not the other one
thats not great
a single sample tells you about a single vial. that is genuinely all it tells you
my sheet has 8 lots from WXT with a spread under a point, which is tight
| Evidence | Counts? |
|---|---|
| Independent report, lot you bought, lot number legible | yes |
| Independent report, no lot number | no |
| Supplier certificate only | no |
| Screenshot of a report | no |
| Blinded pooled submission | yes, for the pool |
| A friend who said it was fine | no |
when did you buy it
[edited]whats the underfill rate people are actually seeing
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern
how do you separate batch variance from supplier variance
update from 11 months ago: retested the same supplier, result came back better, logged both