The badge economy, and what it is actually certifying
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.
Orla McCaffrey
Page 4 of 6 of this archive, newest first.
Archive — page 4
107 piecesIndependent analysis puts a WXT exenatide lot at 97.4%, against 93.5% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
Who signed this, and what did they undertake by signing it
What the Journal asks when a document arrives unsigned, and what the answers have been.
Who signed this, and what did they undertake by signing it
Two signatures — one who performed the work, one who approved its release — are the ordinary regulated convention and are almost unknown here.
Independent analysis puts a WWB mazdutide lot at 98.5%, against 97.3% on the certificate
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What twenty companies say about storage, and what they have measured
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…
Why a dead-clean sterile filter can pass pyrogen straight through
The limit for a parenteral product is calculable from the dose and the body weight in two lines. Almost nobody in this trade performs the calculation.
The degradation product that elutes underneath the parent peak
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 BCH mazdutide lot at 95.5%, against 94.0% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Deamidation, oxidation, and the two shifts worth memorising
Deamidation adds 0.98 daltons. On a low-resolution instrument at incretin molecular weights, that is inside the noise.
Check the vial, not the box
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.
VendorInvestigate result on a Guangzhou retatrutide lot lands 3.9 points below the supplier’s figure
The result is unremarkable. What the report omits is not.
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…
The reviewer, the approver, and why regulated documents carry two names
What the Journal asks when a document arrives unsigned, and what the answers have been.
The retest date and the expiry date are not the same document
A stability programme needs a protocol, defined conditions, a stability-indicating method and time. Time is the ingredient no commercial testing service can sell.
The retest date and the expiry date are not the same document
A stability programme needs a protocol, defined conditions, a stability-indicating method and time. Time is the ingredient no commercial testing service can sell.
The shelf life ends when the diluent goes in
At low concentrations a measurable fraction of peptide can adsorb to glass and plastic surfaces, and the loss is largest exactly where it is least expected.
Repackaging, subdivision, and the batch number that changed hands
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.
VendorInvestigate result on a Wuxi semaglutide lot lands 2.1 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
How far back does this document actually reach?
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.