Page 12 of 33 · 788 questions tagged purity.
Details up front: 96.4% · 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…
Numbers first: 98.4% · Janoshik · 98.2%. 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…
Conditions: 97.1% · VendorInvestigate · 96.4% · Janoshik. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
What I am working with: orforglipron · Medutest. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…
For reference: deamidation · semaglutide · 2–8 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…
The specifics, since they change the answer: fibrillation · ecnoglutide · minus 20 °C. I would like the mechanism, because I want to be able to reason about the cases…
Concretely: 98.2% · 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,…
Concretely: semaglutide · 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…
I have a COA in front of me with all of the following on it, and I cannot work out which of these numbers is the one I care about: Appearance: white lyophilised…
Concretely: 99.4% · VendorInvestigate · 95.2% · Medutest. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
The case in front of me: 99.1% · VendorInvestigate · 96.8%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without…
Concretely: 96.4% · oral semaglutide · BCH. 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…
Setup, so nobody has to ask: retatrutide · a C18 column · survodutide. Both of these get recommended confidently by different people, which suggests neither is…
The case in front of me: a quantified content assay · liraglutide. I would like the axes of comparison first and the recommendation second. I have tried the first…
I am comparing a supplier certificate against an independent result on the same lot. Please show the division. I want to check my own against yours. I would like the…
I am comparing a supplier certificate against an independent result on the same lot. I have worked this out and I would like someone to find the error, because I…
Setup, so nobody has to ask: 97.6% · a GLP-1 receptor agonist · HJ. I am trying to build something sustainable rather than something thorough that I will abandon. I…
For reference: deamidation · survodutide · 25 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…
Details up front: hydrolysis · dulaglutide · 4 °C. I suspect the usual explanation for this is wrong, or at least incomplete. I am aware this may have a boring…
Setup, so nobody has to ask: 97.1% · Medutest · 97.9% · Janoshik. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
What I am working with: 98.2% · Medutest · 96.4%. 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: 96.4% · Janoshik · 98.8%. 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…
What I have: racemisation · orforglipron · 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…
What I am working with: a formic acid mobile phase · a GLP-1 receptor agonist · a wide-pore C18 column. I keep seeing this stated as a fact with no explanation…