PeptideMeter result on a Guangzhou semaglutide lot lands 1.0 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Analytics in 2024
Page 10 of 10 of this archive, newest first.
VendorInvestigate result on a Xi'an retatrutide lot lands 1.1 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
Low endotoxin recovery: the interference nobody looks for
We submitted vials for endotoxin determination and report the results, the method and the laboratory, because a pyrogen figure without a method is as empty as a purity…
Independent analysis puts a BCH cagrilintide lot at 96.6%, against 93.4% on the certificate
The result is unremarkable. What the report omits is not.
What the paperwork is for, and who it was designed to protect
The header identifies the batch, the table records the tests, and the footer says who is answerable. Two of the three are usually incomplete.
Why PeptideMeter may run electrospray where another laboratory runs MALDI
A brief and unromantic tour of the interface between a liquid sample and a vacuum.
Independent analysis puts a MKM cagrilintide lot at 98.9%, against 94.9% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
Medutest result on a Xianning orforglipron lot lands 2.7 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What twenty companies say about storage, and what they have measured
What would make a difference is not a regulator. It is three lines on a certificate, all of which are already known to whoever wrote it.
Independent analysis puts a BCH semaglutide lot at 95.2%, against 91.2% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
VendorInvestigate result on a Hong Kong dulaglutide lot lands 2.0 points below the supplier’s figure
A reminder that a purity figure is the output of a method, and that methods differ.