QST names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Certificates of analysis
Page 21 of 51 of this archive, newest first.
Independent analysis puts a QST dulaglutide lot at 95.4%, against 91.5% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
What a laboratory knows about the material it receives
A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody records how it was drawn.
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.
Six words a verification badge would need to mean anything
What a verification mark would have to carry to be checkable: a date, a lot, a method, a submitter and a link to the report.
A tested vial is evidence about a vial
A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody records how it was drawn.
ERP 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 JEEP orforglipron lot at 95.5%, against 92.7% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
What twenty companies say about storage, and what they have measured
A stability programme needs a protocol, defined conditions, a stability-indicating method and time. Time is the ingredient no commercial testing service can sell.
PeptideMeter result on a Qingdao cagrilintide lot lands 1.4 points above the supplier’s stated figure
A reminder that a purity figure is the output of a method, and that methods differ.
Independent analysis puts a HJ dulaglutide lot at 98.7%, against 96.2% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
What changed at QST in July, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
South Korea health authority warns on falsified tirzepatide pens
Reported from the analysis, not from a warning notice.
PeptideMeter result on a Hong Kong mazdutide lot lands 2.6 points above the supplier’s stated figure
The result is unremarkable. What the report states alongside it is not.
Sweden health authority warns on falsified exenatide pens
Reported from the analysis, not from a warning notice.
Why a dead-clean sterile filter can pass pyrogen straight through
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.
What a diode array adds, and why the certificate never shows it
A diode-array detector records the whole spectrum at every time point and can confirm that a peak is spectrally homogeneous. Almost nobody prints that information.
Electrospray, MALDI, and the choice that shapes every spectrum after it
The two ionisation techniques in general use produce different charge distributions, different adducts and different failure modes. Certificates almost never say which was…
Independent analysis puts a FGP retatrutide lot at 97.1%, against 95.4% on the certificate
The result is unremarkable. What the report states alongside it is not.