Page 27 of 32 · 749 questions tagged coa.
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…
What I am working with: 98.4% · a C18 column · ecnoglutide. I would like help reading this properly rather than being told what conclusion to reach. I have the full…
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…
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…
Concretely: ecnoglutide · VendorInvestigate. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the…
What I am working with: 98.8% · a C18 column · ecnoglutide. I would like help reading this properly rather than being told what conclusion to reach. I have the full…
Stated plainly: WXT · ChinaPeptides (QYAOBIO). I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can obtain either…
What I am working with: ERP · Nantong Guangyuan Chemical. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can…
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: 98.2% · batch certificate. I have read the primary source rather than the summary, which has left me with more questions. I understand the headline. I…
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…
Numbers first: JEEP · Bachem Holding (Suzhou). I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a defensible…
Setup, so nobody has to ask: 97.9% · sampling plan. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…
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: a Karl Fischer water content test · oral semaglutide. These are treated as interchangeable and I do not think they are. If both are acceptable I would…
What I have: 95.2% · purity figure. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone else’s…
The specifics, since they change the answer: identity confirmation by mass spectrometry · survodutide. I am trying to choose between two options that are usually…
The particulars: liraglutide · ten weeks · 30 °C. I would like to define my thresholds before I have a result, for obvious reasons. I want a plan with explicit…
For reference: oral semaglutide · 95.2%. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…
Details up front: Medutest · retatrutide. I can find plenty of assertions about this and almost no reasoning, which is usually a sign that nobody has checked. Assume…
Numbers first: 97.6% · purity figure. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone else’s…
What I have: an HPLC purity test · a five-person group buy. This is a planning question. I know what my options are; I do not know how to weigh them. What I want is…
Numbers first: WWB · Bachem Holding (Suzhou). I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…
The particulars: 97.9% · 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…