Page 16 of 33 · 771 questions tagged coa.
Concretely: a quantified content assay · tirzepatide. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…
The particulars: a residual-solvent screen · a ten-person group buy. I would like to set this up properly once, rather than adjust it repeatedly. My budget is real…
What I am working with: WWB · a Karl Fischer water content test. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to…
Stated plainly: PeptideMeter · Qingdao Saber Technology. I want to understand what this actually establishes, as opposed to what it is being used to imply. My concern…
I have been through one internal appeal already and would like to do the next one properly. I suspect the usual explanation for this is wrong, or at least incomplete.…
Stated plainly: MKM · a residual-solvent screen. I would rather understand the derivation than memorise the outcome. Two people I asked gave two answers that differ…
I have a logging thermometer, a box of insulin syringes and no illusions about my worktop being sterile. I can predict the outcome but I cannot explain it, which…
Conditions: date of analysis · TFC. 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 am comparing a supplier certificate against an independent result on the same lot. I would like help reading this properly rather than being told what conclusion to…
Stated plainly: 96.8% · Medutest · 97.6%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything…
The case in front of me: ecnoglutide · twelve weeks · 37 °C. I want to decide this in advance so that I am not deciding it under pressure later. Assume I will follow…
The specifics, since they change the answer: tirzepatide · list of related substances. I want to understand what this actually establishes, as opposed to what it is…
Numbers first: 97.1% · Janoshik · 96.8%. 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: 96.4% · 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…
Conditions: PeptideMeter · Tianjin Finder Chemical. I want to understand what this actually establishes, as opposed to what it is being used to imply. My concern is…
Setup, so nobody has to ask: dulaglutide · sampling plan. I have read the primary source rather than the summary, which has left me with more questions. I understand…
Conditions: method section · QST. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am reasonably comfortable with…
What I am working with: an HPLC purity test · dulaglutide. I have used one of these for a while and I am considering switching, which requires a reason. What I care…
Vendor listings say "sterile" and "sterile filtered" more or less interchangeably, and I have started to suspect these words are doing no work at all. I would like to…
Details up front: SWB · Shanghai ERP Biotechnology. I have used one of these for a while and I am considering switching, which requires a reason. What I care about is…
Stated plainly: SWB · Flourishglobal Peptide Biotech. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…
What I am working with: Medutest · dulaglutide. I can find plenty of assertions about this and almost no reasoning, which is usually a sign that nobody has checked.…
What I am working with: SWB · a quantified content assay. This should be a straightforward calculation and I keep getting two different answers. The numbers are…
What I have: method section · HJ. I have the document in front of me and I can read the numbers. What I cannot do is interpret them. I am reasonably comfortable with…