Objective :To establish the quality standard for Qianqu. Method :Radix et Rhizoma Rhei

Radix aucklandiae and Fructus Aurantii immaturus were identified by TLC.Strychnine was determinated by HPLC

and chromatographic conditions was as follows: column of Dikma Diamonsil C18(4.0 mm×250 mm

5 μm)

mobile phase consisting of acetonitrile-0.02% H3PO4(19 ∶81)

flow rate of 1mL min-1

and detection wavelength of 283 nm. Result :The characteristic identification by TLC was distinct and highly specific. Strychnine showed a good linear relationship at a range of 10.568-528.4 mg·L-1(r=0.999 98)

the average recovery was 100.18%(RSD 2.73%)

precision with RSD of 0.37% (n=6)

repetition with RSD of 0.88% (n=6)and stability with RSD of 0.70%. Conclusion :The method is reliable

accurate

specific and can be used for quality control of the production.