How to read a peptide Certificate of Analysis (COA): a technical note

A technical note on reading a peptide Certificate of Analysis (COA): the fields on a lot COA, lot number traceability, HPLC purity, LC-MS identity, net peptide content versus purity, the testing laboratory, how to verify a COA with the lab, and common COA problems. Canonical version: https://wholesalepeptide.us/guides/how-to-read-a-peptide-coa For laboratory research use only. Not for human or veterinary use.