Simultaneous analysis and identification of main bioactive constituents in extract of Zizyphus jujuba var. sapinosa (Zizyphi spinosi semen) by high-performance liquid chromatography–photodiode array detection–electrospray mass spectrometry

A high-performance liquid chromatography (HPLC) coupled with UV photodiode array detection and electrospray mass spectrometry (HPLC–DAD–ESI-MS) was developed for the simultaneous analysis and identification of main bioactive constituents in extract of zizyphi spinosi semen including three flavonoids, three alkaloids and four triterpene saponins. The separation was achieved on a C18 column with a gradient solvent system of 0.08% aqueous formic acid solution-acetonitrile. The compounds were identified with MS-spectra and authentic standards. The contents of jujuboside A, jujuboside B, spinosin and 6‴-feruloyl spinosin were quantified by using DAD in different extract of zizyphi spinosi semen.