神香草中迷迭香酸和总多糖含量测定方法研究

摘要

OBJECTIVE:To establish a method for content determination of rosmarinic acid and total polysaccharide in Hysso-pus. offcinalis. METHODS:HPLC was conducted to determine the content of rosmarinic acid in H. offcinalis. The column was Shim-pack VP-ODS with mobile phase of acetonitrile-0.5% formic(17:83,V/V) at flow rate of 1.0 ml/min,detection wavelength was 330 nm,column temperature was 30 ℃,and the injection volume was 10 μl. UV-visible spectrophotometry was conducted to determine the content of total polysaccharide,detection wavelength was 620 nm. RESULTS:The linear range was 10.86-54.30 μg/ml (r=0.999 8)for rosmarinic acid and 1.996-15.97 μg/ml for total polysaccharide(r=0.999 6);RSDs of precision,stability and re-producibility tests were lower than 1.0% and 2.0%,respectively;recoveries were 98.20%-101.79%(RSD=1.68%,n=6) and 96.62%-101.68%(RSD=1.88%,n=6). CONCLUSIONS:The method is simple and reproducible,and can be used for the con-tents determination of rosmarinic acid and total polysaccharide in H. offcinalis.%目的:建立测定神香草中迷迭香酸和总多糖含量的方法.方法:采用高效液相色谱法测定神香草中迷迭香酸的含量.色谱柱为Shim-pack VP-ODS,流动相为乙腈-0.5%甲酸(17:83,V/V),流速为1.0 ml/min,检测波长为330 nm,柱温为30℃,进样量为10μl.采用紫外-可见分光光度法测定神香草中总多糖的含量,检测波长为620 nm.结果:迷迭香酸检测质量浓度线性范围为10.86~54.30μg/ml(r=0.999 8);精密度、稳定性、重复性的RSD<1.0%;加样回收率为98.20%~101.79%,RSD为1.68%(n=6).总多糖检测质量浓度线性范围为1.996~15.97μg/ml(r=0.999 6);精密度、稳定性、重复性试验的RSD<2.0%;加样回收率为96.62%~101.68%,RSD为1.88%(n=6).结论:该方法操作简便、重复性好,可用于神香草中迷迭香酸和总多糖含量的测定.