Page 19 of 32 · 749 questions tagged coa.
Numbers first: SGN · orforglipron. I am asking for verification rather than opinion, ideally with something I can read myself. It is possible the evidence exists and…
This is my second independent submission on material from the same supplier. I would like to define my thresholds before I have a result, for obvious reasons. I want…
What I am working with: 96.4% · Medutest · 98.4%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…
The particulars: 96.8% · PeptideMeter · 99.1%. Something has gone wrong and I would like to know how badly before I decide what to do. Nothing else in the setup…
Stated plainly: QSC · Xi’an Mokemei Biotechnology. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can obtain…
Setup, so nobody has to ask: retatrutide · eight weeks · 30 °C. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not…
The specifics, since they change the answer: oral semaglutide · PeptideMeter. I want to understand what this actually establishes, as opposed to what it is being used…
Concretely: QST · Guangzhou JEEP Biotechnology. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know that, so…
Concretely: 96.8% · VendorInvestigate · 99.4%. 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…
I have kept every message, invoice and document, which I gather is the useful habit. I have read the obvious sources and they disagree with each other, so I would…
Stated plainly: FGP · mazdutide. This has the shape of a fact but I cannot find its origin. What I found instead were three secondary sources all citing each other.…
The specifics, since they change the answer: date of analysis · Homopeptide. I would like to define my thresholds before I have a result, for obvious reasons. I want…
I have been through one internal appeal already and would like to do the next one properly. I want to understand what this actually establishes, as opposed to what it…
For reference: VendorInvestigate · ecnoglutide. I want a method I can write down and repeat, not a rule of thumb. I would rather over-engineer this than discover a…
Concretely: list of related substances · MKM. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow the plan I…
For reference: 97.9% · a wide-pore C18 column · mazdutide. I want to understand what this actually establishes, as opposed to what it is being used to imply. My…
What I am working with: retatrutide · eight weeks · 37 °C. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not…
What I am working with: orforglipron · 95.2%. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far,…
Numbers first: cagrilintide · six weeks · room temperature. This is a planning question. I know what my options are; I do not know how to weigh them. What I want is…
Conditions: 97.9% · VendorInvestigate · 99.4%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident…
Setup, so nobody has to ask: a residual-solvent screen · a GLP-1 receptor agonist. I suspect the honest answer is that it depends, in which case I would like to know…
The case in front of me: chromatogram · GL Biochem. I would like to know the limits of what can be inferred from this. What I am trying to avoid is over-reading a…
The case in front of me: CPC · Shanghai Wibson Biotechnology. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
Conditions: 96.8% · a C4 column · retatrutide. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the…