purity

Numbers first: SGN · retatrutide. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone else’s…

For reference: MKM · semaglutide. 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…

I have both a purity figure and a content figure, which is why the discrepancy is visible. I suspect the usual explanation for this is wrong, or at least incomplete.…

Numbers first: racemisation · dulaglutide · 40 °C. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to know…

What I have: 98.2% · Janoshik · 97.9% · Medutest. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…

What I have: 99.4% · Janoshik · 97.1%. 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…

For reference: 98.4% · survodutide. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator because…

The particulars: identity confirmation by mass spectrometry · aspartimide formation · a GLP-1 receptor agonist. The comparison I want does not seem to exist anywhere…

The particulars: liraglutide · PeptideMeter. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am reasonably…

Concretely: ecnoglutide · a C4 column · mazdutide. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…

The case in front of me: 98.4% · VendorInvestigate · 97.6% · Medutest. These are treated as interchangeable and I do not think they are. If both are acceptable I…

The case in front of me: 98.8% · liraglutide · FGP. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I…

Setup, so nobody has to ask: aggregation · cagrilintide · room temperature. The empirical answer seems settled. The explanation does not. If the honest answer is that…

Numbers first: 98.2% · 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…

Stated plainly: 97.6% · a C18 column · ecnoglutide. I have read the primary source rather than the summary, which has left me with more questions. I understand the…

Setup, so nobody has to ask: 97.1% · mazdutide. I have worked this out and I would like someone to find the error, because I suspect there is one. My working so far,…

What I am working with: 95.2% · Medutest · 99.4%. 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: +4 · 4207.2 Da. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an…

Numbers first: 99.4% · Janoshik · 98.2% · Medutest. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…

The specifics, since they change the answer: 97.6% · PeptideMeter · 98.8% · Medutest. I am trying to choose between two options that are usually discussed as though…

The specifics, since they change the answer: 97.6% · PeptideMeter · 95.2% · PeptideMeter. I am trying to choose between two options that are usually discussed as…

What I have: a TFA mobile phase · orforglipron · a C4 column. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would…

What I have: a sterility test · dimerisation · tirzepatide. I have used one of these for a while and I am considering switching, which requires a reason. What I care…

Numbers first: 95.2% · retatrutide · MKM. I would rather over-plan the first cycle and simplify later. I am prepared to do the work if someone can tell me which work…