Identification of Chemical Constituents in Guizhi Decoction by High Performance Liquid Chromatography/Electrospray Ionization-Ion Trap-Time-of-Flight Mass Spectrometry
OBJECTIVE: To qualitatively identify the chemical constituents in Guizhi decoction by high performance liquid chromatography( HPLC)/electrospray ionization-ion trap-time-of-flight mass spectrometry.METHODS: Analysis was conducted on an Agilent Zorbax SB C_(18) column( 4. 6 mm × 250 mm,5 μm) with 0. 1%formic acid( A)-acetonitrile( B) as the mobile phase for gradient elution. ESI ion source was used for MS,and MS data were collected in negative and positive modes. RESULTS: Through analyzing MS data and elemen...