Page 9 of 35 · 833 questions tagged purity.
Stated plainly: 95.2% · a C18 column · semaglutide. I have read the primary source rather than the summary, which has left me with more questions. I understand the…
What I have: 98.8% · retatrutide. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out, I would rather…
Stated plainly: 99.1% · sampling plan. I would like help reading this properly rather than being told what conclusion to reach. I have the full report including the…
Details up front: 95.2% · Janoshik · 97.6% · Medutest. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
A vendor sent me a report showing a clean deconvolved mass at 4113.6 for semaglutide with, in their words, "no impurity peaks detected". Their sales copy turns that…
The particulars: 99.1% · PeptideMeter · 96.8%. An unexpected observation, and I would like a differential rather than reassurance. The conditions were within what I…
Conditions: 98.4% · oral semaglutide · BCH. 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…
Numbers first: 95.2% · retatrutide. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the method is…
The case in front of me: +5 · 4813.5 Da. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well…
Concretely: HJ · liraglutide. 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 result, which I…
The method section is present, which is unusual enough that I want to make use of it. The empirical answer seems settled. The explanation does not. If the honest…
Setup, so nobody has to ask: orforglipron · a C18 column · retatrutide. I suspect the honest answer is that it depends, in which case I would like to know on what.…
What I am working with: 99.1% · Medutest · 95.2% · PeptideMeter. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
What I have: 98.2% · Janoshik · 97.9% · PeptideMeter. I have used one of these for a while and I am considering switching, which requires a reason. What I care about…
Conditions: aspartimide formation · liraglutide · 40 °C. This is one of those things that everyone repeats and nobody derives. This matters practically, not just…
Details up front: 95.2% · lot-specific certificate. This is presented as though it settles something, and I am not convinced it does. I have two documents that appear…
Setup, so nobody has to ask: 95.2% · Medutest · 96.8% · PeptideMeter. I suspect the honest answer is that it depends, in which case I would like to know on what.…
Setup, so nobody has to ask: 98.2% · a C18 column · ecnoglutide. I would like help reading this properly rather than being told what conclusion to reach. I have the…
The specifics, since they change the answer: +4 · 3751.0 Da. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers…
The case in front of me: 95.2% · VendorInvestigate · 97.9%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without…
Setup, so nobody has to ask: 95.2% · Medutest · 96.8% · Janoshik. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
I am comparing a supplier certificate against an independent result on the same lot. The empirical answer seems settled. The explanation does not. If the honest…
What I have: peptide mapping · ecnoglutide. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments for each and…
The case in front of me: 99.1% · a C4 column · retatrutide. I would like to know the limits of what can be inferred from this. What I am trying to avoid is…