Page 12 of 35 · 833 questions tagged purity.
Stated plainly: 97.6% · cagrilintide. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of magnitude and it…
Concretely: 97.1% · a C4 column · orforglipron. 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…
Stated plainly: dimerisation · cagrilintide · 4 °C. I keep seeing this stated as a fact with no explanation attached, and unexplained facts make me suspicious. My…
Details up front: 99.4% · list of related substances. I can parse the result. I am less sure what it licenses me to conclude. I have deliberately not looked at anyone…
The specifics, since they change the answer: 96.8% · PeptideMeter · 96.4% · Janoshik. The comparison I want does not seem to exist anywhere in a form I can evaluate.…
Details up front: racemisation · orforglipron · 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…
Details up front: racemisation · retatrutide · 4 °C. I can predict the outcome but I cannot explain it, which means I will get the next case wrong. I would like to…
What I am working with: 99.4% · cagrilintide · TFC. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real but not tight, and…
Concretely: 98.2% · tirzepatide · WXT. The failure mode I am trying to avoid is making this decision emotionally. I have twelve months in view and I would like the…
The specifics, since they change the answer: 98.2% · survodutide · WWB. I am at the decision point and I would rather think it through than improvise. I would rather…
Stated plainly: aggregation · cagrilintide · 2–8 °C. The empirical answer seems settled. The explanation does not. If the honest answer is that nobody knows, I would…
The specifics, since they change the answer: a phosphate-buffered mobile phase · semaglutide · a C18 column. I would like the mechanism, because I want to be able to…
The specifics, since they change the answer: 98.8% · PeptideMeter · 98.4%. An unexpected observation, and I would like a differential rather than reassurance. The…
The specifics, since they change the answer: VendorInvestigate · 97.9%. An unexpected observation, and I would like a differential rather than reassurance. The…
The specifics, since they change the answer: 97.6% · ecnoglutide. I would rather understand the derivation than memorise the outcome. Two people I asked gave two…
I have the report as a PDF with the chromatogram on page two, so I can quote specifics. I would like the arithmetic checked rather than the conclusion asserted. I…
Concretely: 96.8% · method section. The figures are clear enough; the question is what they mean and what they do not. I can supply the numbers if the specifics…
The particulars: 98.4% · PeptideMeter · 97.1% · Medutest. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments…
Concretely: aspartimide formation · tirzepatide · 30 °C. This is one of those things that everyone repeats and nobody derives. This matters practically, not just…
Details up front: 96.4% · orforglipron. 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…
Numbers first: 98.4% · Janoshik · 98.2%. 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…
Conditions: 97.1% · VendorInvestigate · 96.4% · Janoshik. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to…
Setup, so nobody has to ask: orforglipron · Medutest. I would like help reading this properly rather than being told what conclusion to reach. I have the full report…
For reference: deamidation · semaglutide · 2–8 °C. I understand the observation; what I do not understand is the mechanism behind it. I have read the two review…