tried purity for 3 weeks. here is what happened.
I have had 10 orders now and I keep a table, so here is the honest summary rather than a vibe.
Material has been consistent. Communication has not. Shipping has varied by about 30 days on nominally the same lane, which matters more in summer than in February.
The independent number came back 97.9% against a claimed 98.0%, which I read as agreement rather than a discrepancy — inter-lab variance on this assay is a point or two either way and treating one lab as ground truth is how people end up in pointless arguments with vendors.
Batch number is in the comments. Ask if you want the method.
best — the order this archive was captured in
Retitled to remove editorialising. Put the evidence in the body.
No. This is the kind of confident post that gets copied into a screenshot and repeated for years. Where is the evidence.
Four months on the site and I was confusing area% and mass% in every post I made. One explainer thread and it clicked.
Slight fix: the number was 99.1, not 96.8. Decimal point, but a fairly consequential one.
Four months on the site and I was confusing area% and mass% in every post I made.
Disagree on that part. 98.4% and 98.3% on the same vial is normal.
The COA I was holding said 96.8% area and I thought it was trash. Turns out the method was solid and the impurity profile was clean.
area% is not mass%, and here is exactly why it matters
Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.
What were the related substances listed individually?
[deleted]
Water content was 3.8%, acetate was 6.2%, purity was 99%, but net peptide was only 90% of the label weight. Perfectly honest, just chemistry.
axis labels included, always
That is net peptide content, not purity. Different number, different meaning.
PDF metadata is checkable in fifteen seconds
No. This is the kind of confident post that gets copied into a screenshot and repeated for years. Where is the evidence.
the batch number or it did not happen
That is net peptide content, not purity. Different number, different meaning.
- 1The COA I was holding said 96.8% area and I thought it was trash. Turns out…14 comments in this branch · started by u/chidi_demir
- 2Retitled to remove editorialising. Put the evidence in the body.5 comments in this branch · started by u/coa_collector