The certificate of analysis, line by line
The header identifies the batch, the table records the tests, and the footer says who is answerable. Two of the three are usually incomplete.
Certificates of analysis
Page 22 of 51 of this archive, newest first.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
What changed at SWB 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.
The United Arab Emirates health authority warns on falsified liraglutide pens
Reported from the analysis, not from a warning notice.
Accuracy, precision and the tolerance nobody states
Parts per million sound impressive until they are converted into daltons at the molecular weight of the thing being measured.
QSC declines, for the 4th 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.
Independent analysis puts a QST orforglipron lot at 98.0%, against 94.2% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Twenty-eight days is a number from somebody else’s product
An in-use period is established by a dedicated study on a specific formulation in a specific container at a specific concentration. Borrowing one from a marketed product is…
VendorInvestigate result on a Changsha liraglutide lot lands 3.2 points below the supplier’s figure
A reminder that a purity figure is the output of a method, and that methods differ.
What changed at CPC 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.
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.
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.
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.
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.