how many lots do you need before you can say anything about a supplier
#test-results 2025-02-27
Thursday14 messages5 participantstimes are UTC
Highlights from this day
quantity testing is usually a separate line item and it is the one worth paying for
| 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 |
selection bias
underfill is more common than impurity. if you only test purity you are testing the less likely failure
if you are testing to settle an argument you will not settle it with n of 1
if you are testing to settle an argument you will not settle it with n of 1
ok so how much does sample handling on my end affect the number
i test roughly every tenth vial. it is a sampling strategy, not paranoia
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real
when did you buy it
Recon calculator: 10mg in 2.5ml = 5mg/ml.
log the lot number
a point or two between the certificate and an independent result is inside what two labs disagree by
[edited]follow up does a bad result on one lot condemn the whole supplier
📈16
which lab