help me understand purity, I have read the wiki twice
Trying to settle this properly because the thread from last year went in circles.
The claim: certificate of analysis matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 10 months without either producing anything.
What would actually settle it is 31 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
The evidence standard in c/vendorvetting gets called too strict about once a month, and every time, the thread ends with the complainant agreeing.
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the batch number or it did not happen
area% is not mass%, and here is exactly why it matters
no "is this good?" without saying what the compound and claimed purity are
Slight fix: the number was 99.0, not 98.9. Decimal point, but a fairly consequential one.
Water content on the document? That affects your concentration math.
Strongly agree. Mass% and area% are answering different questions on the same document.
no "is this good?" without saying what the compound and claimed purity are
Tested the GLB raw material and a reseller vial side-by-side. Same purity claim, different impurity profiles. Handling matters.
the counterion is part of the mass you paid for
Cosigning. The batch number is load-bearing information.
the related substances line is where the story is
the method line is doing real work, not just window dressing
Respectfully this is a sample of one presented as a finding.
redact your own name, not the vendor's batch details
Disagree. What you are describing is consistent with certificate of analysis, not with what you concluded.
Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.
the counterion is part of the mass you paid for
post the whole document, not the headline number
Water content on the document? That affects your concentration math.
purity and net content are two different numbers, same vial
What were the related substances listed individually?
Asked HJ for the batch-specific COA and they sent it within six hours, full document, batch number, date, everything. That is the baseline.
Batch number and date of analysis? Both are load-bearing.
The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.
the method line is doing real work, not just window dressing
- 1The evidence standard in c/vendorvetting gets called too strict about once a…9 comments in this branch · started by u/halima_boateng
- 2Disagree. What you are describing is consistent with certificate of…9 comments in this branch · started by u/anecdata_annie