The badge is about a sample. The listing is about a product.
Every step between the laboratory report and the product page removes information, and the badge is the last step.
Certificates of analysis
Page 39 of 51 of this archive, newest first.
Twenty-eight days is a number from somebody else’s product
Bacteriostatic water contains benzyl alcohol at 0.9 per cent, which inhibits microbial growth in a preserved multiple-dose presentation. It does not sterilise a contaminated…
Independent analysis puts a JEEP tirzepatide lot at 96.0%, against 92.6% on the certificate
The result is unremarkable. What the report omits is not.
What orthogonal actually means, and what it does not
An orthogonal method separates on a different physical principle, so that species co-eluting in the first are likely to resolve in the second. Two runs of the same method at…
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.
Two ways to lift a peptide into a vacuum, and why the answer differs
The ionisation method determines the charge states you see, the adducts you must account for, and the modifications you might destroy in the process.
Two gradients, one sample, two purities
A shallow gradient resolves impurities that a steep one runs into the parent peak. Both methods are legitimate; only one of them can see the small stuff.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
QYB declines, for the 10th 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 JEEP semaglutide lot at 98.0%, against 96.9% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
Medutest result on a Changsha survodutide lot lands 4.3 points below the supplier’s figure
A reminder that a purity figure is the output of a method, and that methods differ.
Four ways a peptide comes apart
Reversed-phase chromatography runs in an organic, acidic mobile phase that dissociates most non-covalent aggregates on the way to the detector.
Independent analysis puts a SSA retatrutide lot at 95.4%, against 93.5% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
Six tells, in order of how quickly they can be checked
A blank certificate with the numbers left editable is an ordinary internal document. Its circulation as a finished record is the problem.
Electrospray, MALDI, and the choice that shapes every spectrum after it
A brief and unromantic tour of the interface between a liquid sample and a vacuum.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Canada health authority warns on falsified liraglutide pens
Reported from the analysis, not from a warning notice.
Accreditation, scope, and the question nobody asks PeptideMeter
Two signatures — one who performed the work, one who approved its release — are the ordinary regulated convention and are almost unknown here.
What changed at QST in August, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Homopeptide declines, for the 17th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.