u/aurel_boateng
Contributes reviews on supplier material. Based in Kochi.
member · joined 14 May 2025
Comments — page 4 of 4
comment on does first time actually matter or is it forum lore at this point in c/newbiequestions · 7 points · 2 years ago
the normal question is not dumb
comment on [Question] how do you actually verify concentration in c/reconstitution · 92 points · 2 years ago
The single most useful thing I did was write the concentration on the vial. Stopped all the confusion after that.
comment on [Discussion] we are measuring COA at the wrong time and calling it noise in c/coa · 36 points · 2 years ago
Not to be pedantic but water content and area percent are being used interchangeably and they are not interchangeable in real life.
comment on [Discussion] we are measuring COA at the wrong time and calling it noise in c/coa · 391 points · 2 years ago
the related substances line is where the story is
comment on [Discussion] we are measuring COA at the wrong time and calling it noise in c/coa · 837 points · 2 years ago
The evidence standard in c/vendorvetting gets called too strict about once a month, and every time, the thread ends with the complainant agreeing.
comment on [Question] how do you actually verify normal in c/newbiequestions · 114 points · 2 years ago
Water content matters more than people think. If a vial is carrying residual moisture, your "10mg" is not 10mg of peptide.
comment on [Discussion] can we stop arguing about related substances until somebody posts a number in c/coa · 0 points · 2 years ago
area% is not mass%, and here is exactly why it matters
comment on [Lab] split one vial across VendorInvestigate and PeptideMeter — 98.0% and 97.9% in c/coa · 433 points · 2 years ago
Inter-lab variance on this kind of assay is routinely 1–2 points. Different column, different gradient, different integration.
comment on [Meta] the units rule is doing its job and people should stop complaining in c/reconstitution · 47 points · 2 years ago
stopper coring on the 2th draw because you keep using the same entry point. rotate.
comment on [Lab] 8th independent test on BCH, and the trend is the interesting part in c/coa · 72 points · 2 years ago
the related substances line is where the story is
comment on the batch question that gets asked weekly, answered properly in c/coa · 74 points · 2 years ago
Sent one vial to PeptideMeter and VendorInvestigate.
Adding to this: batch is doing more work than the comment implies.
comment on reconstitution: what the trials say vs what this community says in c/reconstitution · 233 points · 2 years ago
Show the arithmetic. Where did the units come from?
comment on [Question] how do you actually verify water content in c/coa · 1 points · 2 years ago
Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.
comment on [Discussion] the related substances advice in here is 15 years out of date in c/coa · 2 points · 2 years ago
Cosigning. The batch number is load-bearing information.
comment on why does nobody talk about reconstitution in c/reconstitution · 52 points · 2 years ago
comment on genuine question about certificate of analysis that I am slightly embarrassed to ask in c/coa · 183 points · 2 years ago
redact your own name, not the vendor's batch details
comment on genuine question about certificate of analysis that I am slightly embarrassed to ask in c/coa · 313 points · 2 years ago
This is the correct framing. The COA structure matters as much as the number.
comment on [Discussion] can we stop arguing about units until somebody posts a number in c/reconstitution · 130 points · 2 years ago
Is that 5mg vial or 5mg?