Quality assurance for research peptides depends on verified identity, appropriate purity testing, content determination, documentation, and controlled handling. This guide outlines practical considerations for laboratories evaluating and using peptide reagents.
Peptide purity percentages are essential quality indicators, but they do not tell the whole story. Understanding how purity is measured and how it differs from identity, content, and activity helps researchers choose the right grade for each application.
Mass spectrometry measures ions by mass-to-charge ratio to identify, characterize, and quantify molecules. This article explains the main components, workflows, applications, and limitations of MS.