PeptideMeter result on a Zhuhai cagrilintide lot lands 1.5 points above the supplier’s stated figure
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Vendors
Page 43 of 48 of this archive, newest first.
Wuhan export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
VendorInvestigate result on a Changsha dulaglutide lot lands 3.5 points above the supplier’s stated figure
A reminder that a purity figure is the output of a method, and that methods differ.
A tested vial is evidence about a vial
Every third-party report in this market describes a sample somebody chose to send. That choice is outside the laboratory’s control and outside its records.
Same material, different gradients, different answers
The Journal submitted split samples from single lots to three assay services, under names unconnected to this publication, and published each method alongside each result.
Independent analysis puts a SWB dulaglutide lot at 96.2%, against 95.6% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
What a 29% rise in coupling-reagent prices does to a 2 mg vial
Follow the resin, not the catalogue.
Blind duplicates: what happens when a laboratory does not know it is being watched
Two years ago we ran an anonymised version of this comparison and promised a named one. This is it, with every method printed in full.
What changed at QYB in March, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Custody, condition and the temperature nobody logged
The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
A supplier suspends shipping to France after 23 consecutive customs detentions
The route did not close because of a rule about peptides.
MKM names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Shanghai export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
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.
A supplier suspends shipping to Mexico after 23 consecutive customs detentions
The route did not close because of a rule about peptides.
Twelve things a real certificate has, and what their absence means
The header identifies the batch, the table records the tests, and the footer says who is answerable. Two of the three are usually incomplete.
What a 33% rise in coupling-reagent prices does to a 20 mg vial
Follow the resin, not the catalogue.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
A supplier suspends shipping to Saudi Arabia after 19 consecutive customs detentions
The route did not close because of a rule about peptides.