Page 5 of 33 · 788 questions tagged purity.
Stated plainly: 99.4% · Medutest · 96.8%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have photographed the…
The specifics, since they change the answer: 97.6% · PeptideMeter · 98.8%. An unexpected observation, and I would like a differential rather than reassurance. The…
What I have: 99.1% · Janoshik · 96.8% · Medutest. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…
Details up front: 96.8% · a C8 column · liraglutide. This is presented as though it settles something, and I am not convinced it does. I have two documents that…
Stated plainly: 99.4% · Medutest · 96.4% · PeptideMeter. Both of these get recommended confidently by different people, which suggests neither is obviously right. My…
I have both a purity figure and a content figure, which is why the discrepancy is visible. I can predict the outcome but I cannot explain it, which means I will get…
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…
This is my second independent submission on material from the same supplier. I can find plenty of assertions about this and almost no reasoning, which is usually a…
The case in front of me: 98.4% · VendorInvestigate · 98.8%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without…
Setup, so nobody has to ask: 96.8% · mazdutide. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far,…
The method section is present, which is unusual enough that I want to make use of it. The figures are clear enough; the question is what they mean and what they do…
Concretely: 96.8% · a C4 column · dulaglutide. 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…
Stated plainly: Janoshik · 97.9%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything yet, so a…
Concretely: oxidation · oral semaglutide · 30 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What prompted the…
Conditions: 99.1% · oral semaglutide · WXT. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the plan I write…
Concretely: 97.6% · VendorInvestigate · 98.8% · Janoshik. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
The specifics, since they change the answer: 98.4% · semaglutide. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not…
Conditions: +5 · 4113.6 Da. 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 value…
What I am working with: WXT · mazdutide. I have read the primary source rather than the summary, which has left me with more questions. I understand the headline. I…
Conditions: oxidation · tirzepatide · 4 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What prompted the question is…
The case in front of me: PeptideMeter · 96.4%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident…
Stated plainly: 96.4% · cagrilintide. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far, for the…
Numbers first: 96.4% · Janoshik · 98.8% · Medutest. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…
Stated plainly: 98.2% · a GLP-1 receptor agonist. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so…