[Question] Australia — has anyone got a straight answer on integration
Genuinely asking, not being difficult.
Everyone in c/glp1uk repeats that method development is important. I believe it, but I have never seen anyone show why, and when I search I get 15 threads of people agreeing with each other.
Is there a paper? Is there a measurement? Or is this one of those things that is true because it has been repeated since 2023?
I am not trying to be the "source?" guy. I would just like a source.
best — the order this archive was captured in
co-elution is real and HPLC is usually not enough to resolve it
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Yeah, the chromatogram profile matters more than the headline number.
two labs, two different baselines, two different purity numbers, both honest
That is net peptide content, not purity. Different number, different meaning.
related substances are where the story lives, not the main peak
related substances are where the story lives, not the main peak
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
Injection volume and flow rate? Those affect resolution.
The VendorInvestigate result being close to my own HPLC is the signal, not the absolute number. Both are right.
The related substances profile is way more interesting than the main peak %. A 98% with 12 peaks is different from a 98% that is one 38% impurity.
two labs, two different baselines, two different purity numbers, both honest
Yeah, the chromatogram profile matters more than the headline number.
Retitled to remove editorialising. Put the evidence in the body.
the detector wavelength matters more than people think
- 1co-elution is real and HPLC is usually not enough to resolve it8 comments in this branch · started by u/arne_nyberg
- 2The VendorInvestigate result being close to my own HPLC is the signal, not…7 comments in this branch · started by u/hedda_ekstrom