Determination of Isofraxidin in Pientzehuang Oral Tablet by RP-HPLC / 中药新药与临床药理

Objective :To establish a RP-HPLC method for determination of isofraxidin in Pientzehuang oral tablet. Methods: RP-HPLC analysis was carried out on Nava-Pak C18 column and with acetonitrile: 0.1%phosphoric acid (15∶85) as a mobile phase. Results: The linear range was 12.9～90.3 ?g/mL(r=0.9999,n=7).The average recovery rate was 102.65 %and RSD=0.71 %.The intra-day and inter-day RSD was less than 3 %.Conclusion :This method is simple, rapid and accurate and suitable for the quality control of the preparations of Chinese herbal medicine containing isofraxidin.