极谱催化波法测定中草药中的芦丁  

Determination of rudin in Chinese herb medicines by its polarographic catalytic wave

作　　者：邵承斌[1] 吴四维[1] 田龙[1] 张忠[1] 

机构地区：[1]重庆工商大学环境与生物工程学院,重庆400067

出　　处：《分析试验室》2006年第11期103-105,共3页Chinese Journal of Analysis Laboratory

摘　　要：基于芦丁在K2S2O8存在下产生的极谱催化波,拟定了测定中草药中芦丁的方法.在0.1 mol/L HAc-NaAc（pH 3.60±0.05）,8×10^-3 mol/L K2S2O8支持电解质中,芦丁催化波峰电位为-1.37 V （vs. SCE）,它的二阶导数峰电流与其浓度在1.6×10^-6～1.6×10^-5 mol/L 范围内呈线性关系（r=0.9960,n＝6）.检出限为9.013×10^-11 mol/L,回收率为96.18%～102.66%.样品可不经分离,直接测定.采用该方法测得山楂和川明参中芦丁的质量分数分别为1.78%和1.60%.A novel method for the determination of mtin was proposed based on its polarographic catalytic wave in the presence of K2 S2O8. In 0.1 mol/L NaAc - HAc （ pH 3.60 ±0.05） and 8 × 10^- 3 mol/L K2 S2O8 supporting electrolyte, the peak potential of a catalytic wave for mtin was observed at - 1.37 V （ vs. SCE）. The peak current of the catalytic wave was rectilinear to the mtin concentration in the range of 1.6 × 10^-6 - 1.6 × 10^-5 mol/L （r = 0.9960, n = 6）. The detection limit is 9.013 × 10^-11 mol/L. The contents of mtin in the hawkthom and chuanminshen, and mtin products can be directly determined without preseparation. This method is sample, rapid and accurate.

关 键 词：芦丁 过硫酸钾 极谱催化波 中草药 山楂 川明参 

分 类 号：O657.1[理学—分析化学]