How to audit an identity claim in five minutes
The regulated world states the method, the instrument, the convention and the tolerance. This market states a verdict.
Purity
Page 45 of 51 of this archive, newest first.
What changed at ERP in May, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
The fourteen-day problem, and what it does to a commercial testing model
We asked all four services what they can determine, on what timescale, at what price, and under what accreditation. The answers are printed in full.
What a mass spectrometer does to a peptide before it measures anything
The ionisation method determines the charge states you see, the adducts you must account for, and the modifications you might destroy in the process.
SGN declines, for the 12th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
How a claim degrades between the bench and the listing
Every step between the laboratory report and the product page removes information, and the badge is the last step.
Turkey health authority warns on falsified tirzepatide pens
Reported from the analysis, not from a warning notice.
Independent analysis puts a Homopeptide cagrilintide lot at 98.1%, against 94.7% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
SWB declines, for the 4th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
SGN declines, for the 16th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Five things a purity figure cannot tell you
Aggregates dissociate in the mobile phase and are recorded as monomer. Only a size-based separation reports them.
VendorInvestigate result on a Zhuhai survodutide lot lands 0.9 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Japan health authority warns on falsified dulaglutide pens
Reported from the analysis, not from a warning notice.
The isotope pattern tells you the charge, and the charge tells you the mass
A peptide has a monoisotopic mass and an average mass, they differ by several daltons at this molecular size, and a certificate that does not say which it quotes cannot be…
PeptideMeter result on a Chengdu exenatide lot lands 3.6 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
Six words a verification badge would need to mean anything
A badge asserts that something was tested. It does not assert what, when, on whose sample, by what method, or whether the lot on sale is the lot that was tested.
Blind duplicates: what happens when a laboratory does not know it is being watched
Duplicate submissions under different names test within-laboratory repeatability, which is a different quantity from between-laboratory reproducibility.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.