Page 3 of 33 · 788 questions tagged purity.
Concretely: 95.2% · liraglutide · ERP. 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 down,…
The case in front of me: 99.1% · 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…
Concretely: 96.4% · VendorInvestigate · 99.4% · Janoshik. I would like the axes of comparison first and the recommendation second. I have tried the first option and…
What I am working with: retatrutide · a C18 column · retatrutide. Both of these get recommended confidently by different people, which suggests neither is obviously…
Numbers first: SGN · dulaglutide. 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 case in front of me: 97.6% · VendorInvestigate · 96.8% · PeptideMeter. These are treated as interchangeable and I do not think they are. If both are acceptable I…
Stated plainly: dimerisation · mazdutide · room temperature. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make me…
For reference: 97.9% · ecnoglutide · JEEP. I am at the decision point and I would rather think it through than improvise. I would rather spend money on measurement…
The particulars: identity confirmation by mass spectrometry · ecnoglutide. I am trying to choose between two options that are usually discussed as though only one…
What I have: 97.1% · lot-specific certificate. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear to…
The particulars: 96.4% · PeptideMeter · 98.8%. An unexpected observation, and I would like a differential rather than reassurance. The conditions were within what I…
The particulars: SSA · ecnoglutide. 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…
The particulars: 95.2% · PeptideMeter · 98.8% · Janoshik. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments…
Details up front: 99.4% · Janoshik · 97.1% · Janoshik. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
The specifics, since they change the answer: 98.8% · PeptideMeter · 97.9%. An unexpected observation, and I would like a differential rather than reassurance. The…
The case in front of me: 98.8% · oral semaglutide · QSC. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I…
The specifics, since they change the answer: 98.4% · chromatogram. I want to understand what this actually establishes, as opposed to what it is being used to imply.…
The particulars: 98.8% · a wide-pore C18 column · a GLP-1 receptor agonist. I want to understand what this actually establishes, as opposed to what it is being used…
What I have: +2 · 4207.2 Da. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is what I am…
The particulars: 99.4% · PeptideMeter · 97.1%. Something has gone wrong and I would like to know how badly before I decide what to do. Nothing else in the setup…
Details up front: 99.4% · retatrutide · GL Biochem. I would rather over-plan the first cycle and simplify later. I am prepared to do the work if someone can tell me…
I have the report as a PDF with the chromatogram on page two, so I can quote specifics. Somebody stated this to me confidently and I would like to check it before…
I split one vial and sent halves to two independent laboratories. Purity came back 98.1% and 99.4%. Both sent chromatograms. Both look competent. The 1.3-point gap is…
Setup, so nobody has to ask: Janoshik · 97.6%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded…