Page 19 of 20 · 466 questions tagged hplc.
Conditions: oxidation · liraglutide · 2–8 °C. This is one of those things that everyone repeats and nobody derives. This matters practically, not just academically,…
Numbers first: Medutest · 98.2%. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and eliminated…
The particulars: 99.4% · a wide-pore C18 column · mazdutide. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am…
The specifics, since they change the answer: VendorInvestigate · 98.8%. An unexpected observation, and I would like a differential rather than reassurance. The…
Stated plainly: 97.1% · sampling plan. I would like help reading this properly rather than being told what conclusion to reach. I have the full report including the…
Setup, so nobody has to ask: dimerisation · 37 °C. The empirical answer seems settled. The explanation does not. If the honest answer is that nobody knows, I would…
The specifics, since they change the answer: 95.2% · chromatogram. I want to understand what this actually establishes, as opposed to what it is being used to imply.…
Conditions: 98.8% · liraglutide. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number, so I…
Details up front: Medutest · 97.9%. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and…
Conditions: 97.1% · 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,…
What I have: racemisation · retatrutide · 25 °C. I suspect the usual explanation for this is wrong, or at least incomplete. I am aware this may have a boring answer.…
Numbers first: 99.1% · lot-specific certificate. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear to…
What I have: Medutest · 97.6%. 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 date, and I…
Numbers first: hydrolysis · 37 °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 how confident…
The particulars: oral semaglutide · a wide-pore C18 column · liraglutide. I am trying to choose between two options that are usually discussed as though only one…
The particulars: 99.4% · ecnoglutide. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ by a factor…
What I have: cagrilintide · a C8 column · mazdutide. 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: tirzepatide · a wide-pore C18 column · cagrilintide. The comparison I want does not seem to exist anywhere in a form I…
Setup, so nobody has to ask: 96.8% · a C18 column · semaglutide. I would like help reading this properly rather than being told what conclusion to reach. I have the…
I have the report as a PDF with the chromatogram on page two, so I can quote specifics. This is presented as though it settles something, and I am not convinced it…
Details up front: a TFA mobile phase · dulaglutide · a C4 column. I suspect the usual explanation for this is wrong, or at least incomplete. I am aware this may have…
Details up front: mazdutide · 96.8%. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…
Stated plainly: 96.8% · a C18 column · survodutide. I have read the primary source rather than the summary, which has left me with more questions. I understand the…
Concretely: 97.1% · 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…