Why Purity Matters in Peptide Research

When sourcing peptides for research, purity is one of the most critical variables affecting experimental validity. An impure compound can introduce confounding variables that compromise data integrity and lead to irreproducible results.

Understanding HPLC Analysis

High-Performance Liquid Chromatography (HPLC) is the gold standard for peptide purity testing. It separates compounds based on their physical and chemical properties, allowing quantification of the target peptide relative to impurities. A purity result of 99%+ via HPLC means that at least 99% of the detected material is the target compound.

Reading a Certificate of Analysis

A proper COA should include: the compound name and sequence, batch number, synthesis date, HPLC purity percentage with chromatogram, mass spectrometry data confirming molecular weight, and the testing laboratory’s details.

Kilo. Research StandardEvery batch we ship includes a full COA from an independent laboratory with HPLC chromatogram and mass spectrometry confirmation. We publish all COAs publicly on our product pages.