below spec — 22 things I got wrong before I got it right
Thinking out loud about this: below spec — 22 things I got wrong before I got it right.
Date of analysis anchors the result to a manufacturing period. A two-year-old result is evidence about two years ago and should be read that way.
If the report gives a mass spectrum as well as UV purity, say so. Identity and relative quantity are separate claims and the log tracks both.
TFC BPC, batch matched the paperwork, PeptideMeter came back 98.6% against a claimed 98.0%. Paid for it myself, posting it because the log is only worth anything if people do.
Please do not ask me what dose you should be on. I genuinely do not know and neither does anyone else here.
best — the order this archive was captured in
A series across separate lots estimates a process. Repeat tests on one lot estimate the measurement. Both are useful and they answer different questions.
First result I ever posted here got asked for the batch number and the claim. Fair, and my posts have been better ever since.
Did the vial lot match the paperwork lot?
What was the claim on the certificate you are comparing against?
if you are going to test, test the thing you actually received
Chain of custody is why member-funded testing is worth more than a supplied certificate: the vial tested is the vial that arrived at a member’s door.
Right, and a point or two between services is ordinary. It is agreement, and every month somebody posts it as a scandal.
the trend across lots is worth more than any single figure
Not convinced by the comparison. Different services, different gradients, and you are treating one as ground truth.
Not convinced by the comparison.
Disagreeing with this line: that gap is ordinary variance, not a contradiction between the lab and the certificate.
area percent unless the report says otherwise
Area percent and net peptide content are different measurements and most reports give one. Quote which, or the comparison downstream is meaningless.
vendor, compound, batch, service, result — that is the template
a result with no batch number is about a vial nobody can identify