Page 3 of 8 · 179 questions tagged reference-standard.
Details up front: mazdutide · a C8 column · survodutide. I have used one of these for a while and I am considering switching, which requires a reason. What I care…
The specifics, since they change the answer: liraglutide · a wide-pore C18 column · survodutide. I am trying to choose between two options that are usually discussed…
Details up front: 99.1% · Janoshik · 96.8% · Janoshik. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…
Following on from the certification discussion: I want to quantify the damage. Suppose a lab's standard is assigned 95.0% and its true potency is 88.0%. Does my…
Setup, so nobody has to ask: 96.4% · Medutest · 98.8% · Medutest. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
Setup, so nobody has to ask: 95.2% · Medutest · 98.4% · Medutest. Both of these get recommended confidently by different people, which suggests neither is obviously…
Numbers first: mazdutide · a C8 column · liraglutide. 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: 96.8% · PeptideMeter · 96.4% · PeptideMeter. The comparison I want does not seem to exist anywhere in a form I can…
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…
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…
What I have: 98.2% · Janoshik · 97.9% · Janoshik. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…
The particulars: 98.4% · PeptideMeter · 97.1% · PeptideMeter. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read 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…
Concretely: semaglutide · a C4 column · tirzepatide. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know…
Concretely: 99.4% · VendorInvestigate · 95.2% · Medutest. 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: retatrutide · a C18 column · survodutide. Both of these get recommended confidently by different people, which suggests neither is…
I am comparing a supplier certificate against an independent result on the same lot. Please show the division. I want to check my own against yours. I would like the…
I am comparing a supplier certificate against an independent result on the same lot. I have worked this out and I would like someone to find the error, because I…
Setup, so nobody has to ask: 97.1% · Medutest · 97.9% · Janoshik. I suspect the honest answer is that it depends, in which case I would like to know on what. Assume I…
What I am working with: a formic acid mobile phase · a GLP-1 receptor agonist · a wide-pore C18 column. I keep seeing this stated as a fact with no explanation…
I have both a purity figure and a content figure, which is why the discrepancy is visible. I understand the observation; what I do not understand is the mechanism…
The particulars: 98.8% · PeptideMeter · 96.4% · Janoshik. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments…
The specifics, since they change the answer: 96.4% · PeptideMeter · 97.9% · Janoshik. The comparison I want does not seem to exist anywhere in a form I can evaluate.…
For reference: 97.1% · PeptideMeter · 96.8% · Medutest. I am trying to choose between two options that are usually discussed as though only one exists. I am not…