#test-results 2025-09-01

whats the lot

if the vial has been through a bad transit you are testing the transit as much as the supplier

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my result contradicts the supplier certificate, do i tell them

whats the underfill rate people are actually seeing
a point or two between the certificate and an independent result is inside what two labs disagree by

a single sample tells you about a single vial. that is genuinely all it tells you

how do you separate batch variance from supplier variance

a result without a lot number and a purchase date is an anecdote with a pdf attached

coming back to this 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

weigh it first

while im here post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later