[Lab] SGN cagri — VendorInvestigate came back 93.7% against a claimed 98.6%
Confession thread, sort of.
I went from 0.25mg to 10mg much faster than I should have because the scale had stalled and I got impatient. The stall broke about 22 weeks later, at which point I had no way of knowing whether the dose increase did anything or whether it would have broken anyway.
So now I have injection-site soreness I did not need and a data point I cannot interpret. Two lessons in one.
Posting it in the hope that somebody at week 4 reads it before doing the same thing.
best — the order this archive was captured in
The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.
instrument quality is less important than analyst consistency
Retitled to remove editorialising. Put the evidence in the body.
A shoulder on the main peak that 18 analysts integrated 25 different ways. Same trace, 99.3 spread.
a round-robin on baseline integration would be genuinely useful
Yeah, the chromatogram profile matters more than the headline number.
co-elution is real and HPLC is usually not enough to resolve it
Yeah, the chromatogram profile matters more than the headline number.
state the method: column, gradient, detection wavelength, injection volume
two labs, two different baselines, two different purity numbers, both honest
No. This is the kind of confident post that gets copied into a screenshot and repeated for years. Where is the evidence.
two labs, two different baselines, two different purity numbers, both honest
two labs, two different baselines, two different purity numbers, both honest
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
two labs, two different baselines, two different purity numbers, both honest
- 1instrument quality is less important than analyst consistency9 comments in this branch · started by u/alcohol_aversion
- 2i wish i had read this 24 months ago4 comments in this branch · started by u/mateusz_mensah