Identification of Saponins in the Seed of Adzuki Bean (Vigna angularis) by UPLC-PDA-ESI/MS Analysis

Adzuki bean (Vigna angularis) is origin to the tropical region of Asia; currently, it is one of the important crops in Korea, Japan, and China. To our knowledge, the saponins of its seeds have still not been fully characterized. This prompted us to identify the saponins occurring in the seed (cv. Arari) of adzuki beans by employing reversed-phase C-18 column chromatography and high-performance liquid chromatography with electrospray ionization/mass spectrometry analysis.