Page 27 of 33 · 788 questions tagged purity.
Details up front: +2 · 4731.3 Da. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is what…
For reference: 97.9% · PeptideMeter · 99.1% · PeptideMeter. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments…
Setup, so nobody has to ask: 96.4% · cagrilintide · Homopeptide. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but…
Concretely: 97.6% · a C4 column · dulaglutide. 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…
This is a recurring problem with one particular shipping lane rather than a one-off. I suspect the honest answer is that it depends, in which case I would like to…
The method section is present, which is unusual enough that I want to make use of it. I would like to know the limits of what can be inferred from this. What I am…
Conditions: TFC · tirzepatide. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the specifics change the…
The case in front of me: survodutide · a C4 column · mazdutide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like…
The lot number on the vial matches the certificate, which at least rules out the easy problem. I want the working, not the result — I need to be able to redo it with…
What I am working with: 96.4% · Medutest · 97.6% · Medutest. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I can…
Setup, so nobody has to ask: +3 · 3751.0 Da. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude…
Stated plainly: aggregation · mazdutide · 25 °C. The empirical answer seems settled. The explanation does not. If the honest answer is that nobody knows, I would…
For reference: GL Biochem · 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…
What I have: 98.2% · orforglipron · SSA. This is a planning question. I know what my options are; I do not know how to weigh them. What I want is the minimum viable…
What I am working with: 98.4% · cagrilintide. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude…
Conditions: a Karl Fischer water content test · tirzepatide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
Details up front: 96.4% · Janoshik · 95.2% · Janoshik. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
The particulars: 96.4% · semaglutide · KP. I am at the decision point and I would rather think it through than improvise. I would rather spend money on measurement…
This is my second independent submission on material from the same supplier. I have the document in front of me and I can read the numbers. What I cannot do is…
Concretely: semaglutide · a C4 column · semaglutide. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…
Numbers first: +2 · 3751.0 Da. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is what I…
For reference: 98.4% · PeptideMeter · 98.2%. Something has gone wrong and I would like to know how badly before I decide what to do. Nothing else in the setup…
Numbers first: 97.1% · 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 case in front of me: oxidation · tirzepatide · minus 20 °C. I want to know whether this is a real physical effect or an artefact of how it is measured. What…