Prepared by Pillar Research
HPLC vs LC-MS for Peptide Analysis
Sources and editorial policy · Reviewed
How chromatographic separation and mass-based identification answer different analytical questions.
Questions and answers
What does HPLC measure?
HPLC separates sample components under a stated method. A reported chromatographic purity percentage is a method-specific result; it is not automatically the peptide mass in a vial.
What does LC-MS add?
LC-MS combines liquid chromatography with mass-spectrometry data. Read the reported identity result alongside the method and sample identifier, rather than treating any mass signal as complete proof of structure.
What should I compare between reports?
Compare the sample identity, method, reported result and units. Keep identity, chromatographic purity and measured quantity as separate fields. Research Use Only.
Sources and standards
This guide is educational and does not replace method validation, laboratory acceptance criteria, or a review of the exact batch documentation.