芦丁在离子液体[bmim]BF4中的电化学行为及其影响因素

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=0.126 s-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4.0×10-5～1.4×10-4 mol/L范围内呈良好的线性关系, 检出限为1.0×10-5 mol/L, 有望用于芦丁含量的分析测定.

Electrochemical Behavior of Rutin in [bmim]BF_4 Ionic Liquid and Influence Factors

In the medium hydrophilic ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate(BF4),the electrochemical behaviors of rutin(Rt) were studied by linear sweep voltammetry and cyclic voltammetry.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 ...