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A reversed-phase HPLC chromatogram and ESI-MS spectrum beside a lot-specific Certificate of Analysis on a laboratory bench

White Paper

Reading a Certificate of Analysis: HPLC Purity and ESI-MS Identity for Research-Grade Peptides

Our flagship white paper on how to read the analytical record that defines a research-grade peptide — what an HPLC purity percentage actually measures, how ESI-MS confirms identity by mass, why counterion content changes net peptide mass, and how to vet a lot-specific Certificate of Analysis.

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