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.
出处
《分析试验室》
CAS
CSCD
北大核心
2006年第11期103-105,共3页
Chinese Journal of Analysis Laboratory
关键词
芦丁
过硫酸钾
极谱催化波
中草药
山楂
川明参
Rutin
Polarographie catalytic wave
Chinese herb medicine
Hawkthom
Chuanmingshen
