Page 30 of 37 · 865 questions tagged batch-testing.
For reference: 97.9% · PeptideMeter · 99.1% · PeptideMeter. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments…
This is a first order from this supplier, so I have no track record to reason from. This is a procedural question rather than a theoretical one, and I would like the…
Conditions: PeptideMeter · tirzepatide. I have done this once and I suspect I got away with it rather than got it right. For context: I keep records of every batch,…
The method section is present, which is unusual enough that I want to make use of it. I would like to know the limits of what can be inferred from this. What I am…
The case in front of me: survodutide · 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…
The case in front of me: ecnoglutide · twelve weeks · 25 °C. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow…
The lot number on the vial matches the certificate, which at least rules out the easy problem. I have read the primary source rather than the summary, which has left…
Stated plainly: dulaglutide · two weeks · 40 °C. I am trying to build something sustainable rather than something thorough that I will abandon. I have already decided…
Conditions: a quantified content assay · oral semaglutide. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and…
Stated plainly: ERP · a GLP-1 receptor agonist. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…
The specifics, since they change the answer: MKM · Tianjin Finder Chemical. I am trying to choose between two options that are usually discussed as though only one…
What I am working with: 96.4% · Medutest · 97.6% · Medutest. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can…
Conditions: CPC · liraglutide. The claim is plausible, which is exactly why I want to check it. I am able to read a paper if someone points me at one. Can anyone…
Conditions: list of related substances · GGPeps. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the…
Details up front: 96.4% · Janoshik · 95.2% · Janoshik. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
Setup, so nobody has to ask: dulaglutide · batch certificate. I would like help reading this properly rather than being told what conclusion to reach. I have the full…
Conditions: Homopeptide · Sangon Biotech (Shanghai). These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know…
The specifics, since they change the answer: tirzepatide · ten weeks · 2–8 °C. I would like to define my thresholds before I have a result, for obvious reasons. I…
I have both a purity figure and a content figure, which is why the discrepancy is visible. I can parse the result. I am less sure what it licenses me to conclude. I…
The case in front of me: QST · Sangon Biotech (Shanghai). 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: TFC · liraglutide. 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…
For reference: 98.4% · PeptideMeter · 98.2%. Something has gone wrong and I would like to know how badly before I decide what to do. Nothing else in the setup…
The case in front of me: PeptideMeter · 99.4%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident…
The case in front of me: CPC · Sangon Biotech (Shanghai). I would like the axes of comparison first and the recommendation second. I have tried the first option and…