Page 24 of 33 · 788 questions tagged purity.
The particulars: deamidation · survodutide · 4 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…
Setup, so nobody has to ask: 95.2% · Medutest · 97.1% · Janoshik. Both of these get recommended confidently by different people, which suggests neither is obviously…
Details up front: 98.8% · a C8 column · liraglutide. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone…
What I have: mazdutide · a C8 column · retatrutide. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…
The particulars: 98.4% · ecnoglutide · JEEP. I would like to define my thresholds before I have a result, for obvious reasons. I want a plan with explicit stopping…
The method section is present, which is unusual enough that I want to make use of it. This is one of those things that everyone repeats and nobody derives. This…
Concretely: aspartimide formation · oral semaglutide · 30 °C. This is one of those things that everyone repeats and nobody derives. This matters practically, not just…
For reference: deamidation · ecnoglutide · minus 20 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…
Details up front: cagrilintide · a C8 column · survodutide. I have used one of these for a while and I am considering switching, which requires a reason. What I care…
What I have: 97.9% · Janoshik · 97.6% · PeptideMeter. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
The specifics, since they change the answer: deamidation · semaglutide · 40 °C. I understand the observation; what I do not understand is the mechanism behind it. I…
The case in front of me: 98.4% · VendorInvestigate · 95.2%. I think I have a problem. I am not yet sure whether it is a real problem or a measurement artefact. I want…
Conditions: 97.1% · oral semaglutide · QSC. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I would like…
Stated plainly: orforglipron · a C18 column · cagrilintide. Both of these get recommended confidently by different people, which suggests neither is obviously right.…
What I have: racemisation · retatrutide · 2–8 °C. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to know…
Conditions: 98.8% · a C4 column · retatrutide. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the…
Concretely: 99.1% · date of analysis. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a single result,…
Details up front: hydrolysis · retatrutide · 30 °C. I suspect the usual explanation for this is wrong, or at least incomplete. I am aware this may have a boring…
Concretely: 96.4% · oral semaglutide · QSC. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I would like…
What I have: 95.2% · Janoshik · 98.4%. Before I write this off, I want to check whether it is a known failure mode. I have the lot number, the certificate and the…
What I am working with: a residual-solvent screen · mazdutide. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
For reference: 96.8% · PeptideMeter · 98.2%. An unexpected observation, and I would like a differential rather than reassurance. The conditions were within what I…
The particulars: 99.1% · semaglutide. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor…
Details up front: 97.9% · dulaglutide · SSA. I would rather over-plan the first cycle and simplify later. I am prepared to do the work if someone can tell me which…