switched from 12.5mg to 0.5mg and the injection-site soreness got better, not worse
Trying to settle this properly because the thread from last year went in circles.
The claim: COA matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 7 months without either producing anything.
What would actually settle it is 39 people measuring the same thing the same way. I have started; my numbers are below. They lean one way but not strongly enough for me to declare victory.
If you have data, post the data. If you have an opinion, flair it as an opinion.
best — the order this archive was captured in
Strongly agree. Mass% and area% are answering different questions on the same document.
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.
the method line is doing real work, not just window dressing
Did they give you the chromatogram or just the summary line?
Did they give you the chromatogram or just the summary line?
Adding to this: batch is doing more work than the comment implies.
Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.
Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.
the method line is doing real work, not just window dressing
This is the correct framing. The COA structure matters as much as the number.
This is the correct framing.
Yes, exactly this, and it is the bit that took me 47 weeks to accept.
the method line is doing real work, not just window dressing
Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.
redact your own name, not the vendor's batch details
Removed a chain here. The rule is one line long and it is not negotiable.
Strongly agree. Mass% and area% are answering different questions on the same document.
Water content matters more than people think. If a vial is carrying residual moisture, your "10mg" is not 10mg of peptide.
area% is not mass%, and here is exactly why it matters
Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.
Every time this gets posted it hits the front page and every time someone has to re-explain it.
Strongly agree. Mass% and area% are answering different questions on the same document.
post the whole document, not the headline number
Strongly agree. Mass% and area% are answering different questions on the same document.
This is the correct framing. The COA structure matters as much as the number.
- 1the method line is doing real work, not just window dressing7 comments in this branch · started by u/cormac_pereira
- 2Strongly agree. Mass% and area% are answering different questions on the…5 comments in this branch · started by u/sofia_danquah