Page 18 of 20 · 466 questions tagged hplc.
For reference: oral semaglutide · 95.2%. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…
Numbers first: 97.6% · purity figure. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone else’s…
Details up front: 96.8% · retatrutide. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…
The specifics, since they change the answer: liraglutide · a wide-pore C18 column · liraglutide. The comparison I want does not seem to exist anywhere in a form I can…
Concretely: aspartimide formation · liraglutide · minus 80 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What…
The particulars: deamidation · ecnoglutide · 4 °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 · a C4 column · survodutide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know…
For reference: VendorInvestigate · 96.4%. Something has gone wrong and I would like to know how badly before I decide what to do. Nothing else in the setup changed,…
The specifics, since they change the answer: 97.9% · list of related substances. I have the document in front of me and I can read the numbers. What I cannot do is…
I have the report as a PDF with the chromatogram on page two, so I can quote specifics. Something has gone wrong and I would like to know how badly before I decide…
Numbers first: 98.8% · orforglipron. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would rather…
For reference: fibrillation · ecnoglutide · 37 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…
The case in front of me: survodutide · a C4 column · semaglutide. I would like the axes of comparison first and the recommendation second. I have tried the first…
Stated plainly: 99.4% · 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…
What I am working with: dimerisation · cagrilintide · minus 80 °C. The empirical answer seems settled. The explanation does not. If the honest answer is that nobody…
Numbers first: mazdutide · a C8 column · cagrilintide. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…
Concretely: 98.4% · 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 lot number on the vial matches the certificate, which at least rules out the easy problem. I keep seeing this stated as a fact with no explanation attached, and…
Setup, so nobody has to ask: dimerisation · a C18 column. The empirical answer seems settled. The explanation does not. If the honest answer is that nobody knows, I…
Stated plainly: dulaglutide · 98.8%. 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 specifics, since they change the answer: tirzepatide · PeptideMeter. I want to understand what this actually establishes, as opposed to what it is being used to…
Conditions: 97.1% · tirzepatide. 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…
Numbers first: 99.4% · 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…
Details up front: cagrilintide · a C8 column · retatrutide. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have…