Page 15 of 20 · 466 questions tagged hplc.
Setup, so nobody has to ask: aggregation · 25 °C. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make me suspicious. My…
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…
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…
The specifics, since they change the answer: deamidation · 40 °C. I would like the mechanism, because I want to be able to reason about the cases nobody has written…
Stated plainly: orforglipron · a C18 column · cagrilintide. Both of these get recommended confidently by different people, which suggests neither is obviously right.…
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,…
The case in front of me: aspartimide formation · tirzepatide · 37 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What…
Setup, so nobody has to ask: aggregation · 40 °C. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make me suspicious. My…
Setup, so nobody has to ask: dimerisation · cagrilintide · 30 °C. The empirical answer seems settled. The explanation does not. If the honest answer is that nobody…
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…
Concretely: 96.4% · tirzepatide. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well as the…
Conditions: 99.4% · 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…
The particulars: deamidation · semaglutide · 37 °C. I would like the mechanism, because I want to be able to reason about the cases nobody has written about. I have…
Concretely: semaglutide · VendorInvestigate. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the…
Numbers first: a GLP-1 receptor agonist · a C8 column · survodutide. I have used one of these for a while and I am considering switching, which requires a reason.…
Concretely: 96.8% · tirzepatide. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well as the…
Stated plainly: 99.1% · cagrilintide. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude and it…
The method section is present, which is unusual enough that I want to make use of it. I have read the primary source rather than the summary, which has left me with…
What I am working with: 99.1% · a C18 column · ecnoglutide. I would like help reading this properly rather than being told what conclusion to reach. I have the full…
Concretely: 98.4% · liraglutide. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well as the…
What I am working with: 97.9% · a C18 column · ecnoglutide. I would like help reading this properly rather than being told what conclusion to reach. I have the full…
Details up front: Medutest · 98.8%. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and…
What I have: racemisation · 25 °C. I suspect the usual explanation for this is wrong, or at least incomplete. I am aware this may have a boring answer. I would still…