Six words a verification badge would need to mean anything
Lot-level verification with a public report is a real and achievable thing. It exists in this market, on a minority of listings.
Purity
Page 29 of 51 of this archive, newest first.
Why Janoshik may run electrospray where another laboratory runs MALDI
The two ionisation techniques in general use produce different charge distributions, different adducts and different failure modes. Certificates almost never say which was…
What PeptideMeter charges to answer the pyrogen question
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…
WWB declines, for the 14th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a SGN liraglutide lot at 97.4%, against 93.3% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
PeptideMeter result on a Zhuhai mazdutide lot lands 2.7 points below the supplier’s figure
The result is unremarkable. What the report omits is not.
Two documents, two disciplines: purity and sterility are not the same trade
Every certificate circulating in this market answers a question about molecules. Almost none answers a question about organisms, pyrogens, or the integrity of the seal.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
PeptideMeter result on a Tianjin semaglutide lot lands 1.1 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What changed at SSA in February, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a WXT exenatide lot at 97.4%, against 93.5% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
SGN declines, for the 23rd time, to name its synthesis house
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.
Denmark health authority warns on falsified tirzepatide pens
Reported from the analysis, not from a warning notice.
Five lines that would change what a certificate is worth
A reader holding a certificate can work out what it does not cover in about ninety seconds, and that is a useful ninety seconds.
What changed at BCH in February, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Janoshik result on a Suzhou mazdutide lot lands 4.0 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
JEEP declines, for the 23rd time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a GGPeps tirzepatide lot at 96.6%, against 93.7% on the certificate
The result is unremarkable. What the report omits is not.
One measurement, twenty companies, forty compounds
A market that competes on one measurement will optimise that measurement. There are legitimate ways to raise a purity figure that involve no change to the product at all.