Page 22 of 33 · 771 questions tagged coa.
The lot number on the vial matches the certificate, which at least rules out the easy problem. I have done this once and I suspect I got away with it rather than got…
For reference: 97.1% · chromatogram. I want to understand what this actually establishes, as opposed to what it is being used to imply. My concern is that I am being…
Concretely: 98.8% · a C4 column · orforglipron. 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…
The specifics, since they change the answer: date of analysis · Homopeptide. I want to understand what this actually establishes, as opposed to what it is being used…
Numbers first: 99.1% · a C8 column · tirzepatide. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear…
The particulars: lot-specific certificate · KP. I am trying to build something sustainable rather than something thorough that I will abandon. I have already decided…
What I have: 99.1% · Janoshik · 97.9%. 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: identity confirmation by mass spectrometry · semaglutide. I am trying to choose between two options that are usually discussed as though only one exists.…
Conditions: purity figure · SGN. I would like help reading this properly rather than being told what conclusion to reach. I have the full report including the method…
The case in front of me: VendorInvestigate · Sangon Biotech (Shanghai). The figures are clear enough; the question is what they mean and what they do not. I can…
Concretely: QSC · Shanghai Sigma-Audley. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can obtain either option…
What I am working with: 97.9% · Medutest · 98.4%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded…
For reference: purity figure · SWB. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and my tolerance for…
Conditions: 98.8% · VendorInvestigate · 98.2%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident…
What I am working with: ERP · mazdutide. This is asserted often enough that I assumed it was established, and then I went looking for the source. I have searched the…
The case in front of me: 95.2% · a C4 column · orforglipron. The figures are clear enough; the question is what they mean and what they do not. I can supply the…
Setup, so nobody has to ask: 96.4% · a C18 column · survodutide. I would like help reading this properly rather than being told what conclusion to reach. I have the…
Details up front: HJ · Shanghai Wibson Biotechnology. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…
Setup, so nobody has to ask: 98.8% · a C18 column · semaglutide. I have read the primary source rather than the summary, which has left me with more questions. I…
I would like to understand the process rather than be told to try harder. I want to know whether this is a real physical effect or an artefact of how it is measured.…
The specifics, since they change the answer: FGP · ChinaPeptides (QYAOBIO). Both of these get recommended confidently by different people, which suggests neither is…
What I am working with: 97.6% · Medutest · 98.4%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded…
Conditions: VendorInvestigate · Wuhan Wansheng Biotechnology. The figures are clear enough; the question is what they mean and what they do not. I can supply the…
The particulars: purity figure · WWB. I would like help reading this properly rather than being told what conclusion to reach. I have the full report including the…