Page 12 of 32 · 749 questions tagged coa.
For reference: MKM · Qingdao Saber Technology. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments for each and…
Concretely: Homopeptide · Shanghai Wibson Biotechnology. I would like the axes of comparison first and the recommendation second. I have tried the first option and it…
Conditions: PeptideMeter · oral semaglutide. I am trying to do this correctly the first time rather than learn it by getting it wrong. I have already made one mistake…
The case in front of me: a quantified content assay · liraglutide. I would like the axes of comparison first and the recommendation second. I have tried the first…
The lane and the lead time matter as much as the material for what I am doing. I have the document in front of me and I can read the numbers. What I cannot do is…
The method section is present, which is unusual enough that I want to make use of it. I am trying to build something sustainable rather than something thorough that I…
What I am working with: 98.2% · Medutest · 96.4%. This is not behaving the way I expected and I want to understand the discrepancy before I act on it. I have…
What I have: 96.4% · Janoshik · 98.8%. 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…
For reference: GL Biochem · Chinese Peptide Company. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments for…
Numbers first: JEEP · orforglipron. I would rather be corrected now than propagate something wrong. I am specifically not interested in a testimonial; I am interested…
Conditions: 96.4% · VendorInvestigate · 98.2%. I have two candidate explanations and no way to distinguish them. The same procedure has worked without incident…
Stated plainly: 95.2% · a C18 column · survodutide. I have read the primary source rather than the summary, which has left me with more questions. I understand the…
What I have: mazdutide · sixteen weeks · room temperature. I would rather over-plan the first cycle and simplify later. I am prepared to do the work if someone can…
Two COAs for the same nominal product give me endotoxin specifications of "less than 10 EU/mg" and "less than 0.5 EU/mg" respectively. Both pass. The second vendor…
This is my second independent submission on material from the same supplier. I want a method I can write down and repeat, not a rule of thumb. I would rather…
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…
What I am working with: dulaglutide · two weeks · room temperature. I am trying to build something sustainable rather than something thorough that I will abandon. I…
Costs, fees and monitoring all included, I am trying to compare like with like. I have the document in front of me and I can read the numbers. What I cannot do is…
This is a first order from this supplier, so I have no track record to reason from. I want to know whether this is a real physical effect or an artefact of how it is…
Setup, so nobody has to ask: Janoshik · mazdutide. Everything I have found on this is either a forum aside or a product page, neither of which I trust. I am…
Stated plainly: 97.6% · Medutest · 98.2%. I noticed this today and I have not touched anything since, in case the state is diagnostic. I have not discarded anything…
Setup, so nobody has to ask: dulaglutide · Medutest. I have read the primary source rather than the summary, which has left me with more questions. I understand the…
The method section is present, which is unusual enough that I want to make use of it. I have worked this out and I would like someone to find the error, because I…
Conditions: QST · an HPLC purity test. 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 as…