sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern
#test-results 2025-07-26
- pbs_pip — sample handling on your end absolutely affects it. draw cleanly, ship fast, do not let it sit warm what interests me is when the gap goes the same direction every… 11:44
- pbs_pip — i told WXT about a result they would not have liked and they did not argue. credit where it is due 11:57
- secretagogue_sy — weigh the vial before you reconstitute. it costs nothing and catches the common failure 13:09
i told WXT about a result they would not have liked and they did not argue. credit where it is due
right so if you are testing to settle an argument you will not settle it with n of 1
my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
weigh the vial before you reconstitute. it costs nothing and catches the common failure
lot bought purity assay/label
A-2418 2025-03 99.1% 9.6 / 10mg
A-2601 2025-08 98.7% 9.8 / 10mg
B-0114 2026-01 99.3% 9.4 / 10mg
B-0329 2026-04 98.9% 9.9 / 10mgmy read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ
98.1 against a certificate of 98.6 is fine. the same supplier landing low four times in a row is a question
a single sample tells you about a single vial. that is genuinely all it tells you
the widest spread in my data is about 2.6 percentage points across five lots from one supplier
underfill is more common than impurity. if you only test purity you are testing the less likely failure
selection bias
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real
i had a result i am fairly sure was a handling error on my side and i logged it as such
thats within range
how do you post a result so it is actually useful to somebody in a year
weigh it first