Research Library
How peptides are tested and documented -- written for laboratory researchers.
Guide · 5 min
How to Read a Certificate of Analysis (COA)
What each part of a peptide Certificate of Analysis means — batch number, test methods, specification versus result — and the warning signs of a COA you should not rely on.
Read Explainer · 6 minHPLC and Mass Spectrometry: How Peptide Purity and Identity Are Tested
A plain-language explainer of the two core analytical methods behind a peptide COA: what HPLC purity measures, what mass spectrometry confirms, and what neither can tell you on its own.
Read Glossary · 4 minResearch Peptide Glossary
Short definitions of the terms that appear on peptide product pages and Certificates of Analysis, from lyophilized and counter-ion to HPLC, MS and net peptide content.
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