摘要
采用线性扫描伏安法和循环伏安法研究了芦丁在亲水性离子液体1．丁基-3-甲基四氟硼酸盐（[bmim]BF4）中的电化学行为，讨论了扫描速度、富集时间及温度等因素对其电化学行为的影响．结果表明，芦丁在[bmim]BF4中的电极过程是一个受吸附控制的准可逆过程，电子转移数为2，标准速率常数ks=0．126s-1．同时，分别考察了水及乙醇对芦丁氧化还原特性的影响，结果发现，随着水或乙醇含量的增加，芦丁的峰电位负移，峰电流增加，且水的影响比乙醇的影响明显．在离子液体-水体系中，芦丁的峰电流与浓度在4．0×10^-5～1．4×10^-4mol／L范围内呈良好的线性关系，检出限为1．0×10^-5mol／L，有望用于芦丁含量的分析测定．
In the medium hydrophilic ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate （ [ bmim ] BF4 ）, the electrochemical behaviors of rutin （Rt） were studied by linear sweep vohammetry and cyclic vohammetry. The influences of scan rate, accumulation time and temperature on the electrochemical cha- racteristics of Rt were also discussed. The experimental results indicated that the electrode process of Rt was a quasi-reversible process with absorption, and the electron transfer number was 2. The standard rate constant ks of Rt was 0. 126 s -1 in [ bmim] BF4. The effects of water or ethanol on the electrochemical behavior of Rt were investigated systematically. With the increasing of amount of water or ethanol, the peak potential of Rt shifted negatively and the peak current increased, and water affected the system more obviously than ethanol. In the [ bmim] BF4-H20 system, a linear dependence of oxidation current on Rt concentration was obtained in the range of 4. 0×10^-5--1.4 ×10^-4 mol/L, the detection limit was 1.0×10^-5 mol/L. This method could be applied to the determination of rutin content.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第11期2165-2169,共5页
Chemical Journal of Chinese Universities
基金
陕西省教育厅基金(批准号:2009JK515)资助
关键词
伏安法
电化学行为
离子液体
芦丁
Vohammetry
Electrochemical behavior
Ionic liquid
Rutin
作者简介
联系人简介：董社英，女，博士，教授，主要从事电化学分析研究．E—mail：dongsyy@126．com
