ABSTRACT
AIM To establish an HPLC method for the simultaneous content determination of four constituents in Qingzhiyi Tablets (Puerariae lobatae Radix,Phyllanthi Fructus,Salviae miltiorrhizae Radix et Rhizoma,etc.).METHODS The analysis of 50% methanol extract of this drug was performed on a 30 ℃ thermostatic Kromasil C18 column (4.6 mm × 250 mm,5 μm),with the mobile phase comprising of 0.1% formic acid-methanol-acetonitrile flowing at 1.0 mL/min in a gradient elution manner,and the detection wavelength was set at 270 nm.RESULTS Gallic acid,puerarin,salvianolic acid B and tanshinone Ⅱ A showed good linear relationships within the ranges of 11.95-382.48,14.23-455.28,10.77-344.68 and 3.89-124.32 μg/mL,whose average recoveries were 99.96%,100.92%,98.87% and 97.67% with the RSDs of 1.09%,1.30%,1.11% and 1.22%,respectively.CONCLUSION This sensitive,simple and accurate method can be used for the quality control of Qingzhiyi Tablets.