Understanding Peptide Purity Testing: HPLC, Mass Spec, and What the Numbers Mean

A breakdown of how third-party verification methods work, and how to read a certificate of analysis with confidence.

Purity verification is the backbone of trustworthy research supply. This article walks through how HPLC and mass spectrometry results are generated, what a certificate of analysis should contain, and the red flags to watch for when evaluating any supplier's documentation.