What PeptideMeter charges to answer the pyrogen question
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…
Wren Kealoha
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63 piecesIndependent analysis puts a CPC dulaglutide lot at 95.9%, against 94.7% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
The retest date and the expiry date are not the same document
We asked twenty companies three questions about stability data and print every answer, refusal and non-response.
Six words a verification badge would need to mean anything
Every step between the laboratory report and the product page removes information, and the badge is the last step.
Independent analysis puts a BCH mazdutide lot at 98.6%, against 96.0% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
Independent analysis puts a SGN survodutide lot at 96.5%, against 95.8% on the certificate
The result is unremarkable. What the report states alongside it is not.
Independent analysis puts a SSA retatrutide lot at 95.4%, against 93.5% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
The empty half of every certificate of analysis
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.
A named analyst is the cheapest quality signal in this trade
What the Journal asks when a document arrives unsigned, and what the answers have been.
Independent analysis puts a MKM retatrutide lot at 95.5%, against 92.8% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
PeptideMeter result on a Shenzhen semaglutide lot lands 1.9 points above the supplier’s stated figure
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
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 Shenzhen dulaglutide lot lands 1.9 points above the supplier’s stated figure
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
Independent analysis puts a SGN liraglutide lot at 95.7%, against 93.4% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
VendorInvestigate result on a Zhuhai dulaglutide lot lands 2.6 points above the supplier’s stated figure
A reminder that a purity figure is the output of a method, and that methods differ.
Six words a verification badge would need to mean anything
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.
What the paperwork is for, and who it was designed to protect
The header identifies the batch, the table records the tests, and the footer says who is answerable. Two of the three are usually incomplete.
VendorInvestigate result on a Qingdao retatrutide lot lands 3.6 points above the supplier’s stated figure
A reminder that a purity figure is the output of a method, and that methods differ.
VendorInvestigate result on a Wuhan orforglipron lot lands 3.8 points above the supplier’s stated figure
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
A document, not a test: what a certificate actually is
The purity figure is the least informative line on a well-constructed certificate and the only line most buyers read.