Electrochemical study of Aloe-emodin on an ionic liquid-type carbon paste electrode

被引：9
|
作者：
Wang, Yan [1 ,2 ]
Xiong, Huayu [1 ,2 ]
Zhang, Xiuhua [1 ,2 ]
Wang, Shengfu [1 ,2 ]
机构：
[1] Hubei Univ, Minist Educ Key Lab Synth & Applicat Organ Funct, Wuhan 430062, Peoples R China
[2] Hubei Univ, Coll Chem & Chem Engn, Wuhan 430062, Peoples R China
来源：
MICROCHIMICA ACTA | 2010年 / 169卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
Ionic liquid; Aloe-emodin; Carbon paste electrode; Electrochemical redox mechanism; Determination; HIGH-PERFORMANCE; ANTHRAQUINONES; CAMPTOTHECIN; APOPTOSIS; ANTHRONES; BINDER; CELLS;
D O I：
10.1007/s00604-010-0348-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An ionic liquid-type carbon paste electrode (CPIE) was fabricated from 1-butyl-3-methylimidazolium hexafluorophosphate mixed with paraffin oil as the binder. The electrochemistry of Aloe-emodin (AE) at the electrode was investigated at pH 1.0 by cyclic voltammetry and differential pulse voltammetry. The ionic liquid as a binder distinctly enhances the electron transfer rate between AE and the electrode. A redox mechanism is discussed. The CPIE showed good sensitivity, selectivity and stability, and was applied to determine the concentration of AE. Under the optimal conditions, the oxidative peak current increased linearly with the concentration of AE in the range from 10 nM to 12.4 A mu M, with a correlation coefficient of 0.9973. The detection limit is 3.0 nM (at S/N = 3).
引用
收藏
页码：255 / 260
页数：6
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