Objective To establish an UPLC-MS/MS method for simultaneous determination of protocatechuic acid, calycosin-7-glucoside, ginsenoside-Re, ginsenoside Rb1, apigenin and isoliquiritigenin in Jianpi Jiedu(JPJD), and measured the content of these components in JPJD. Methods The 6 components in JPJD was quantitatively studied by UPLC-MS/MS on a Poroshell 120 SB-Aq(50 mm×2.1 mm, 1.7 μm) column with a gradient elution(0.1% formic acid aqueous solution and 0.1% acetonitrile solution). A triple quadrupole mass spect...