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Title: $Determination of Quercetin in Changyanning Preparations by RP-HPLC
Abstract: A RP-HPLC method was established for the determination of quercetin in Changyanning tablet and syrup.The chromatographic conditions were as follows: the mobile phase consisted of methanol and 0.1%H3PO4(50:50),was used at a rate of 1.0 mL/min,the column temperature was set at 30 ℃,and the wavelength for detection was 370 nm.The calibration curve of quercetin was linear in the range of 0.0424~0.424 μg,and r=0.9999.This method was sensitive,quick and accurate for the quantity control of these preparations.