RESUMO
Objective: To establish the method of simultaneous determination of five effective constituents tanshinose Ⅱ A、danshensu、protcate-chualdehyde、puerarin and ferulic acid. Methods: After ultrasonic extraction, HPLC-DAD were used to determine the effective constituents on Zorbax SB-C 8 column with acetonitrile and pH3.0 water(adjusted with H 3PO 4) as a mobile phase. Under the gradient timetable the percent of acetonitrile increased from 5% to 72.5% in 45 min. The flow rate was 1.5mL?min -1 , Five constituents were detected at the most suitable detection wavelength. Results: The average recovery of the five effective constituents is within the range of 100.1%～106.9%(n=3), The test of the accuracy within one day shows that the RSD is less than 2.2%, and the RSD among days less than 2.8%(n=3). The test solution is stable in 10h. Conclusion: The method is accurate, simple, quick, and can be used for determining simultaneously the content of the five effective constituents in Compound Xinnaokang Soft Capsules