batch

three years of Janoshik threads, summarised so you do not have to read them — a position I have arrived at slowly and would like tested. Tested three lots over a year…

Thinking out loud about this: test results — 20 things I got wrong before I got it right. First result I ever posted here got asked for the batch number and the claim.…

help me understand PeptideMeter, I have read the wiki twice — that is what I am asking, and I have already read the wiki twice. Date of analysis anchors the result to a…

the Janoshik thing finally clicked for me and I want to write it down, and I am aware this is a minority view on this board. Fourth lot from the same supplier in the…

Trying to get a straight answer on this: below spec — what am I missing here. Chain of custody is why member-funded testing is worth more than a supplied certificate:…

three years of PeptideMeter threads, summarised so you do not have to read them. It is the sort of thing everyone half-believes and nobody writes down. Inter-lab…

Right: QYB BPC — Medutest came back 99.2% against a claimed 99.0%. I paid for this one myself, nobody sent me anything, and the receipts are in the comments. The…

WWB BPC — Medutest came back 99.4% against a claimed 98.5%. I will put the method line and the batch identifier up front because that is what makes this checkable. The…

Asking properly rather than in a comment on somebody else’s thread: someone explain batch to me like I have not read a paper in years. Chain of custody is why…

unpopular opinion: most of what gets said here about test results are guesswork. Change my mind, genuinely — I have no stake in being right about this. How to build a…

Putting this to the board: proposal — a flair for batch posts. Why the same vial can honestly produce three different numbers. Purity by area percent is relative to…

the batch rule is doing its job and people should stop complaining. Short post, long comment section, probably. Area percent is the peak area of your compound over the…

certificate of analysis is doing more work than we give it credit for. Change my mind, genuinely — I have no stake in being right about this. How to ask for a batch…

purity — 3 things I got wrong before I got it right. Not a hot take, just something I have not seen said plainly here. Net peptide content is the fraction of the powder…

three years of related substances threads, summarised so you do not have to read them, and I am aware this is a minority view on this board. UV at 214nm sees the…

Posting this as a discussion rather than a claim: the related substances thing finally clicked for me and I want to write it down. The document I was worried about…

Medutest — 8 things I got wrong before I got it right, and I am aware this is a minority view on this board. What a result posted here is actually worth, and how to…

below spec is doing more work than we give it credit for. Change my mind, genuinely — I have no stake in being right about this. First result I ever posted here got…

Asking properly rather than in a comment on somebody else’s thread: why does nobody talk about test results. Tested three lots over a year rather than three vials from…

Something I keep coming back to: we are measuring test results at the wrong time and calling it noise. Split one vial between Janoshik and VendorInvestigate. The two…

16th independent test on WXT — 99.3% on a claimed 98.5%, and the trend is the interesting part. I will put the method line and the batch identifier up front because…

reading certificate of analysis threads from 2024 and half of it aged badly, and I am aware this is a minority view on this board. UV at 214nm sees the peptide bond and…

we are measuring below spec at the wrong time and calling it noise — a position I have arrived at slowly and would like tested. On inter-lab disagreement, which…

Asking properly rather than in a comment on somebody else’s thread: how much of what we believe about Medutest actually comes from batch threads. Tested three lots over…