PeptideMeter result on a Hong Kong mazdutide lot lands 1.4 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Purity
Page 22 of 51 of this archive, newest first.
Independent analysis puts a SGN semaglutide lot at 96.6%, against 94.9% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
Independent analysis puts a JEEP retatrutide lot at 96.6%, against 92.9% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
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.
Resolving power and mass accuracy are two different specifications
Parts per million sound impressive until they are converted into daltons at the molecular weight of the thing being measured.
What changed at GL Biochem in June, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
LAL, kinetic chromogenic, recombinant factor C: three ways to the same figure
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…
KP declines, for the 13th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
VendorInvestigate result on a Shenzhen semaglutide lot lands 1.1 points below the supplier’s figure
The result is unremarkable. What the report omits is not.
What changed at QYB in June, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
SSA declines, for the 9th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The tolerance was set by whoever wrote the certificate
The arithmetic of significant figures, applied to a document that routinely reports four of them.
Same mass, different molecule: why identity by mass is not identity
Reversed-phase chromatography runs in an organic, acidic mobile phase that dissociates most non-covalent aggregates on the way to the detector.
What we asked twenty suppliers about stability data
A retest date says that material should be re-examined before use. An expiry date says it should not be used. The trade uses the second word for the first concept.
Mexico health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
The ionisation line on a report is the most informative line on it
The ionisation method determines the charge states you see, the adducts you must account for, and the modifications you might destroy in the process.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Medutest result on a Xi'an orforglipron lot lands 1.0 points below the supplier’s figure
The report states the gradient, the wavelength and the integration threshold, which is more than most.
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.
Date of analysis, date of manufacture, and the gap between them
The interval between manufacture and analysis is the most under-read figure on the page, and the one most likely to matter by the time a vial is opened.