HPLC法同时测定桑叶药材及其炮制品中绿原酸、芦丁和异槲皮苷的含量

摘要

OBJECTIVE:To establish a method for the simultaneous contents determination of chlorogenic acid,rutin and iso-quercitrin in Morus alba,fried M. alba and honeyed M. alba. METHODS:HPLC was performed on the column of Agilent Zorbax SB-C18 with mobile phase of acetonitrile-0.2% phosphoric acid(gradient elution)at a flow rate of 1.0 ml/min,detection wavelen-gth was 350 nm ,the column temperature was 30 ℃,and injection volume was 10 μl. RESULTS:The linear range was 8.20-82.01μg/ml for chlorogenic acid (r=0.999 9),2.76-27.60 μg/ml for rutin (r=0.999 9) and 4.74-47.39 μg/ml for isoquercitrin (r=0.999 9);RSDs of precision,stability and reproducibility tests were lower than 2%;recoveries were 98.58%-100.91%(RSD=1.02%,n=6),99.19%-101.00%(RSD=0.82%,n=6) and 98.41%-101.51%(RSD=1.08%,n=6),respectively. CONCLU-SIONS:The method is simple with good stability and reproducibility,and can be used for the simultaneous determination of chloro-genic acid,rutin and isoquercitrin in different processed drugs of M. alba.%目的：建立同时测定桑叶药材及其炮制品炒桑叶、蜜桑叶中绿原酸、芦丁和异槲皮苷含量的方法。方法：采用高效液相色谱法。色谱柱为Agilent Zorbax SB-C18，流动相为乙腈-0.2％磷酸（梯度洗脱），流速为1.0 ml/min，检测波长为350 nm，柱温为30℃，进样量为10μl。结果：绿原酸、芦丁、异槲皮苷的检测质量浓度线性范围分别为8.20～82.01μg/ml（r＝0.9999）、2.76～27.60μg/ml（r＝0.9999）、4.74～47.39μg/ml（r＝0.9999）；精密度、稳定性、重复性试验的RSD＜2％；加样回收率分别为98.58％～100.91％（RSD＝1.02％，n＝6）、99.19％～101.00％（RSD＝0.82％，n＝6）、98.41％～101.51％（RSD＝1.08％，n＝6）。结论：该方法操作简便，稳定性、重复性好，可用于桑叶药材及其炮制品中绿原酸、芦丁和异槲皮苷含量的同时测定。