Objective: To develop a RP-ion pair HPLC with wavelength switching for the simultaneous determination of 4 components (marine, oxymarine, salicylic acid, benzoic acid) in Fufang Kusheng Shuiyangsuan powder.Methods: An Agilent ZORBAX SB-C18 column(150 mm× 4.6 mm, 5 μm) was used;the mobile phase was acetonitrile (A)-0.1% phosphoric acid solution (0.2 g sodium heptanesulfonate was added to 100 ml solution) at a flow rate of 1.0 ml·min-1;the detection wavelength was 220 nm in 0-12 min and 280 nm in 12-25 min;the column temperature was 30℃.Results: The linear range of marine, oxymarine, salicylic acid and benzoic acid was 0.006 030-0.120 6 μg (r=0.999 4), 0.016 56-0.331 2 μg (r=0.999 9), 0.717 1-14.34 μg (r=0.999 9) and 0.512 0-10.24 μg (r=0.999 9), respectively;the average recovery was 98.14%, 97.20%, 97.05% and 98.39% with the RSDs of 1.38%, 0.32%, 0.81% and 1.26%(n=6) , respectively.Conclusion: The method is simple and rapid, and can be applied in the simultaneous determination of 4 components in Fufang Kusheng Shuiyangsuan powder.

OBJECTIVE:To develop a method for simultaneous determination of harpagide,harpagoside,chlorogenic acid, caffeic acid and phillyrin in Xiaoer qingyan granules. METHODS:HPLC method was adopted. The determination was performed on Zorbax SB-C18 column with mobile phase consisted of acetonitrile-0.1% phosphoric acid solution (gradient elution) at a flow rate of 1.0 mL/min. The detection wavelength was set at 210 nm (0-13 min,harpagide),327 nm (13-25 min,chlorogenic acid and caffeic acid),277 nm(25-29 min,phillyrin),210 nm(29-40 min,harpagosid);the column temperature was 30℃,and sam-ple size was 10 μL. RESULTS:The linear ranges of harpagide,harpagosid,chlorogenic acid,caffeic acid and phillyrin were 8.400-168.0 ng(r=0.9996),11.30-226.0 ng(r=0.9998),128.8-257.6 ng(r=0.9993),8.110-162.2 ng(r=0.9996),29.69-593.8 ng(r=0.9994),respectively. LOQs of the 5 components were 33.39,451.2,515.2,324.5,1188 ng/mL;LODs were 8.348, 112.8,128.8,81.12,297.0 ng/mL,respectively;RSDs of precision,stability and reproducibility tests were all lower than 2.0%. The recoveries were 96.39%-98.64%(RSD=0.83%,n=6),96.60%-98.89%(RSD=0.89%,n=6),96.28%-99.22%(RSD=1.25%,n=6),96.49%-99.54%(RSD=1.16%,n=6),96.26%-99.70%(RSD=1.30%,n=6),respectively. CONCLUSIONS:The method is simple,accurate and suitable for simultaneous determination of 5 components in Xiaoer qingyan granules