Janoshik result on a Nantong exenatide lot lands 3.1 points above the supplier’s stated figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Certificates of analysis
Page 43 of 51 of this archive, newest first.
What VendorInvestigate charges to answer the pyrogen question
Bacterial endotoxin is a heat-stable lipopolysaccharide from the outer membrane of Gram-negative organisms. It survives sterilisation, passes a sterilising filter, and is…
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
The question no chromatogram has ever answered
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.
What “LC-MS: conforms” tells a reader, which is almost nothing
What the Journal asks for when it writes to a supplier about an identity claim, and how often it gets it.
South Korea health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
PeptideMeter result on a Tianjin mazdutide lot lands 4.3 points above the supplier’s stated figure
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
A lyophilised peptide is not stable. It is slow.
We set out what the cycle does, in order, so that a reader can see which of its steps a rushed operation shortens first.
What we asked twenty suppliers about stability data
Storage instructions in this market are close to uniform and almost never accompanied by the study that would justify them. Uniformity is a sign of convention, not of…
JEEP names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The anatomy of the most reproduced page in this trade
The purity figure is the least informative line on a well-constructed certificate and the only line most buyers read.
QYB names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Custody, condition and the temperature nobody logged
What a laboratory can and cannot know about the provenance, storage history and representativeness of what lands on its bench.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a WWB survodutide lot at 99.2%, against 95.5% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
The figure of merit this trade chose, and the four it did not
Chromatographic purity is cheap, fast and comparable-looking. Those three properties, and not its usefulness, explain why it became the industry’s single figure of merit.
What VendorInvestigate is able to certify about a sealed vial, and what it is not
The Journal has read several hundred certificates from twenty companies. We set out what the documents actually cover, and what a reader is filling in from imagination.