Methodology · 8 min read
Quality Control in Peptide Synthesis: HPLC, MS, and Beyond
Ensuring peptide purity is critical for reproducible research. This guide covers analytical techniques including reverse-phase HPLC, mass spectrometry, and amino acid analysis used in quality control.
Why Peptide Quality Control Matters
Consistent identity, purity, and composition are essential for reproducible peptide research. Quality-control programs combine orthogonal analytical methods.
Reverse-Phase HPLC
Reverse-phase HPLC separates peptide components and estimates chromatographic purity. Method development considers solvent, gradient, column, and detection wavelength.
Mass Spectrometry
Mass spectrometry provides molecular-mass confirmation and can reveal truncations, adducts, and other synthesis-related species.
Amino Acid Analysis and Complementary Methods
Amino-acid analysis, spectroscopy, water-content testing, and related methods provide complementary evidence for composition and handling quality.
Building a Robust QC Program
A documented program defines acceptance criteria, reference materials, chain of custody, and reporting practices appropriate to the intended research use.