Page 6 of 33 · 788 questions tagged purity.
Conditions: PeptideMeter · 96.8%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident several times…
What I am working with: 97.6% · Medutest · 98.4% · Janoshik. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can…
Concretely: PeptideMeter · 97.9%. I think I have a problem. I am not yet sure whether it is a real problem or a measurement artefact. I want to know whether this is…
Conditions: 98.4% · VendorInvestigate · 97.6%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident…
Concretely: ecnoglutide · a C4 column · tirzepatide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know…
Stated plainly: 97.1% · cagrilintide · TFC. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and my…
Concretely: 97.6% · VendorInvestigate · 99.1% · Medutest. I would like the axes of comparison first and the recommendation second. I have tried the first option and…
Conditions: ecnoglutide · a C4 column · retatrutide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know…
Conditions: 99.4% · oral semaglutide. 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…
The case in front of me: 98.4% · liraglutide · BCH. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the plan…
Details up front: 95.2% · dulaglutide. 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…
The specifics, since they change the answer: 98.8% · PeptideMeter · 98.4% · Janoshik. I am trying to choose between two options that are usually discussed as though…
For reference: liraglutide · a wide-pore C18 column · tirzepatide. I am trying to choose between two options that are usually discussed as though only one exists. I…
What I have: racemisation · retatrutide · 40 °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…
Details up front: 98.4% · Janoshik · 95.2%. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and…
Conditions: semaglutide · 97.1%. 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…
Setup, so nobody has to ask: 96.8% · Medutest · 98.8%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…
What I have: 98.2% · Janoshik · 96.8% · Medutest. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…
What I am working with: a residual-solvent screen · cagrilintide. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
Stated plainly: 96.4% · a C18 column · ecnoglutide. I have read the primary source rather than the summary, which has left me with more questions. I understand the…
Stated plainly: 97.1% · 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…
Numbers first: 99.1% · 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…
The case in front of me: 99.1% · 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…
For reference: 97.6% · PeptideMeter · 95.2%. An unexpected observation, and I would like a differential rather than reassurance. The conditions were within what I…