test it again
#test-results 2026-02-16
Monday41 messages8 participantstimes are UTC
Highlights from this day
sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
[edited]whats the worst result anyone has logged and what happened next
New independent result logged — Homopeptide, lot C-4402, purity 98.6% (Janoshik).
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my sheet has 6 lots from WWB with a spread under a point, which is tight
whats the lot
the widest spread in my data is about 2.6 percentage points across five lots from one supplier
does anyone log the negative results, the boring ones
whats the underfill rate people are actually seeing
nice result
how much does sample handling on my end affect the number
[edited]does a bad result on one lot condemn the whole supplier
which lab
the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
do the results in this channel skew because people test when suspicious
has a supplier ever disputed a result posted here
thats a fill problem
coming back to this how do you separate batch variance from supplier variance
| 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 |
one data point
is a purity-only test worth the money if underfill is the common failure
i had a result i am fairly sure was a handling error on my side and i logged it as such
selection bias
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log the boring ones
is quantity testing available as a separate thing or bundled
do you test every order or sample it
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anyone tested the same lot twice at different labs
99.2 against a certificate of 97.4 is fine. the same supplier landing low four times in a row is a question
thats within range
*that should say weekly
a result without a lot number and a purchase date is an anecdote with a pdf attached
weigh it first
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post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later
log the lot number
how do you post a result so it is actually useful to somebody in a year
is anyone tracking results over time in a way they would share
my vial assayed under label but the purity was fine, which matters more
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coming back after 25 months with a follow up result, where do i put it
anyone had a result they think was a lab error rather than a bad vial
i have never regretted spending the money on a test. i have regretted not testing twice
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a point or two between the certificate and an independent result is inside what two labs disagree by