RESUMEN
AIM:To develop a high performance liquid chromatography-electrospray ionization-mass spectrometry(HPLC-EMI-MS)analysis approach of Alisma orientalis(Sam.)Juzep.METHODS:A Zorbax SB-C_ 18 column was used under the gradient elution condition with acetonitrile-H_2O.The MS detection was performed on an Agilent ion trap mass spectrometer with an elctrospray ionization source under the positive ion detection mode.RESULTS:Alisol B,alisol B-23-aceate,alisol C-23-aceate,alisol C,16-oxoalisol A and 11-deoxyalisol C were identified by their MS and MS2 fragments.The MS2 fragments of the 6 compounds were completed.CONCLUSION:The total ion current chromatogram of Alisma orientalis(Sam.)Juzep.was more characteristic than of the UV chromatogram.6 bioactive compounds can be simultaneously analyzed by the HPLC-EMI-MS method established in this experiment and it is a good quality control of Alisma orientalis(Sam.)Juzep.