HPLC vs LC-MS
HPLC separates the components of a sample and quantifies their relative abundance, producing a purity figure. LC-MS couples that separation to a mass detector, so each separated component can also be identified by mass. In short: HPLC answers how much of the detected material is the main peak; LC-MS helps answer what that peak is.
Published 2026-08-22 · Updated 2026-08-22 · Reviewed by the Lana editorial team
What does HPLC measure?
HPLC measures retention behaviour and relative peak area. It is well suited to estimating purity and to detecting the presence of related impurities.
What does LC-MS add?
A mass detector reports the mass-to-charge ratio of ionised species. Comparing the observed mass with the theoretical mass of the target peptide supports identity confirmation, and LC-MS screening can also reveal unexpected species present at low levels.
Comparison
HPLC — measures relative chemical purity; does not establish identity or sterility. LC-MS — supports molecular identification and impurity screening; does not establish sterility or endotoxin content.