Page 31 of 37 · 865 questions tagged batch-testing.
The case in front of me: CPC · an HPLC purity test. I want the working, not the result — I need to be able to redo it with different numbers. I care about the…
For reference: SSA · an endotoxin test. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…
I have both a purity figure and a content figure, which is why the discrepancy is visible. This is presented as though it settles something, and I am not convinced it…
Concretely: semaglutide · twelve weeks · minus 80 °C. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the…
Numbers first: 98.2% · Janoshik · 97.9%. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious explanations and…
Stated plainly: BCH · peptide mapping. 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 case in front of me: 97.1% · VendorInvestigate · 98.4%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without…
Concretely: 98.2% · VendorInvestigate · 99.4% · Janoshik. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
The lot number on the vial matches the certificate, which at least rules out the easy problem. The figures are clear enough; the question is what they mean and what…
Numbers first: JEEP · dulaglutide. 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 date,…
Conditions: survodutide · 40 °C · five days. 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 particulars: method section · CPC. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am reasonably comfortable…
Stated plainly: Janoshik · 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 current…
Numbers first: 98.4% · Janoshik · 97.1% · PeptideMeter. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…
This is my second independent submission on material from the same supplier. I have used one of these for a while and I am considering switching, which requires a…
Conditions: ecnoglutide · twelve weeks · room temperature. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow…
What I have: SGN · orforglipron. 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 date, and…
The case in front of me: list of related substances · GL Biochem. The figures are clear enough; the question is what they mean and what they do not. I can supply the…
Concretely: PeptideMeter · 95.2%. 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…
The case in front of me: 97.1% · VendorInvestigate · 95.2% · PeptideMeter. I would like the axes of comparison first and the recommendation second. I have tried the…
The specifics, since they change the answer: peptide mapping · semaglutide. I would like to define my thresholds before I have a result, for obvious reasons. I want a…
The material is still sealed, so I have not committed to anything yet. This is a planning question. I know what my options are; I do not know how to weigh them. What…
Details up front: 97.9% · Janoshik · 99.1% · Medutest. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
For reference: oral semaglutide · 40 °C · fourteen days. I am at the decision point and I would rather think it through than improvise. I would rather spend money on…