VendorInvestigate result on a Chengdu retatrutide lot lands 3.0 points below the supplier’s figure
A reminder that a purity figure is the output of a method, and that methods differ.
Purity
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Who signed this, and what did they undertake by signing it
Somebody has to be answerable for a release document. On most certificates in this market, nobody is named at all.
Independent analysis puts a ERP cagrilintide lot at 98.8%, against 97.3% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
What changed at SGN 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 Xianning semaglutide lot lands 4.4 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
How a claim degrades between the bench and the listing
A badge asserts that something was tested. It does not assert what, when, on whose sample, by what method, or whether the lot on sale is the lot that was tested.
Independent analysis puts a Homopeptide semaglutide lot at 96.0%, against 92.4% on the certificate
The result is unremarkable. What the report omits is not.
A purity figure is a numerator over a denominator, and both are choices
Regulated pharmaceutical practice has explicit reporting, identification and qualification thresholds. This trade has none, which is why a purity figure carries no…
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
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.
Peak capacity, and the honest measure of a separation
Gradient slope is the single most consequential method parameter for a reported purity figure, and it is the one most often omitted.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
From vial to bench: what is recorded and what is assumed
The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.
Argentina 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
The masking phenomenon known as low endotoxin recovery means a formulation can return a clean result while containing endotoxin the assay cannot see.
VendorInvestigate result on a Guangzhou retatrutide lot lands 4.2 points below the supplier’s figure
The result is unremarkable. What the report omits is not.
What changed at WXT in May, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Sterility is not a percentage, which is the whole difficulty
Purity, content, identity, sterility and endotoxin are five separate determinations. A single sheet of paper carrying one of them is not evidence about the other four.
Independent analysis puts a QYB mazdutide lot at 95.3%, against 92.9% on the certificate
The result is unremarkable. What the report omits is not.
PeptideMeter result on a Wuxi dulaglutide lot lands 2.2 points below the supplier’s figure
The report states the gradient, the wavelength and the integration threshold, which is more than most.