OBJECTIVE:To establish a method for the simultaneous determination of paeoniflorin,baicalin and imperatorin in Urticaria pill. METHODS:HPLC was performed on the column of Alltima C18 with mobile phase of methanol-water-Phosphoric ac-id(55∶45∶0.2,V/V/V)at a flow rate of 1.0 ml/min,the detection wavelength was 230 nm for paeoniflorin,280 nm for baicalin and 300 nm for imperatorin,column temperature was 30 ℃,and the volume injection was 10 µl. RESULTS:The linear range was 5.40-54.0 μg/ml for paeoniflorin(r=0.999 8),11.29-112.9 μg/ml for baicalin(r=0.999 7)and 24.95-249.5 μg/ml for imperatorin (r=0.999 9),respectively;the linit of quantitation were 5.4、11.2、30.0 ng,the lirnit of detection were 1.8、2.8、7.5 ng;RSDs of pre-cision, stability and reproducibility tests were lower than 2%;recoveries were 95.88%-98.33%(RSD=0.95%,n=6), 96.86%-99.96%(RSD=1.20%,n=6)and 98.07%-100.55%(RSD=0.92%,n=6),respectively. CONCLUSIONS:The method is simple and accurate with strong specificity and good reproducibility,and can be used for the simultaneous determination of paeoni-florin,baicalin and imperatorin in Urticaria pill.%目的：建立同时测定荨麻疹丸中芍药苷、黄芩苷和欧前胡素含量的方法。方法：采用高效液相色谱法。色谱柱为Alltima C18，流动相为甲醇-水-磷酸（55∶45∶0.2，V/V/V），流速为1.0 ml/min，检测波长为230 nm（芍药苷）、280 nm（黄芩苷）、300 nm（欧前胡素），柱温为30℃，进样量为10µl。结果：芍药苷、黄芩苷和欧前胡素的检测质量浓度线性范围为5.40～54.0μg/ml（r＝0.9998）、11.29～112.9μg/ml（r＝0.9997）、24.95～249.5μg/ml（r＝0.9999）；定量限分别为5.4、11.2、30.0 ng，检测限分别为1.8、2.8、7.5 ng；精密度、稳定性、重复性试验的RSD＜2％；加样回收率分别为95.88％～98.33％（RSD＝0.95％，n＝6）、96.86％～99.96％（RSD＝1.20％，n＝6）、98.07％～100.55％（RSD＝0.92％，n＝6）。结论：该方法简便、准确、专属性强、重复性好，可用于测定荨麻疹丸中黄芩苷、芍药苷和欧前胡素的含量。
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