Page 3 of 19 · 438 questions tagged content-assay.
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…
What I have: 2 mg · orforglipron. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is what…
I am comparing a supplier certificate against an independent result on the same lot. I want to know whether this is a real physical effect or an artefact of how it is…
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…
I am comparing a supplier certificate against an independent result on the same lot. This is one of those things that everyone repeats and nobody derives. This…
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…
The method section is present, which is unusual enough that I want to make use of it. This is one of those things that everyone repeats and nobody derives. This…
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…
What I am working with: retatrutide · 20 mg/mL. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far,…
Setup, so nobody has to ask: an endotoxin test · mazdutide. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not…
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…
For reference: SSA · survodutide. Something has gone wrong and I would like to know how badly before I decide what to do. Nothing else in the setup changed, which is…
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…
The particulars: GL Biochem · survodutide. An unexpected observation, and I would like a differential rather than reassurance. The conditions were within what I…
Numbers first: cagrilintide · 1 mg/mL. 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…
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…
What I am working with: BCH · mazdutide. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have photographed the…
Numbers first: mazdutide · 1 mg/mL. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method 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…
Numbers first: KP · orforglipron. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and eliminated…
The case in front of me: CPC · tirzepatide. 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…
The case in front of me: 10 mg · 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…
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…