一种新的修饰电极的制备及其应用于对苯二酚的高选择性测定
Preparation of a Novel Modified Electrode and Its Application to the Determination of p-Benzenediol with High Selectivity
摘 要
通过电聚合酸性络蓝K于多壁碳纳米管修饰玻碳电极上构建了一种新的修饰电极.研究了该电极的电化学性质,结果表明:该电极表现出优异的电催化和选择性能,可在异构体存在下伏安法选择测定对苯二酚.线性范围在1×10-6~1×10-4mol·L-1,检出限为1×10-7mol·L-1.所制作的电极对水样进行了测定所得结果与光谱法的结果一致.
化学修饰电极
对苯二酚
多壁碳纳米管
酸性络蓝K
电聚合
Voltammetry
Chemically modified electrode
p-Benzenediol
Multi-wall carbon nanotube
Acid chrome blue K
Electropolymerization
Abstract
The pretreated glassy carbon electrode (GCE) was modified by dropping 10 μL of 1.0 g·L-1 suspension of functionized multi-wall carbon nanotube (MWCNT) in N,N′-dimethyl-formamide to the surface of MWCNT,and dried in air.Then the acid chrome blue K (ACBK) was electro-polymerized onto the surface of the MWCNT.In testing for the electrochemical behavior of the modified electrode,PACBK/MWCNT/GCE,excellent electrocatalytic effect and high selectivity toward its reaction with p-benzenediol (p-BZD) were observed.Determination of p-benzenediol was performed satisfactorily in the presence of its isomers.Linear relationship between the anodic peak current and the concentration of p-BZD was obtained in the range of 1×10-6-1×10-4mol·L-1 with a detection limit of 1×10-7mol·L-1.In its application to the analysis of water samples,results obtained were in consistency with the results obtained by spectrometry.
中图分类号 O657.1
所属栏目 试验与研究
基金项目
收稿日期 2006/10/19
修改稿日期
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备注杨平华(1971-),男,湖南茶陵人,讲师,博士研究生,主要研究方向为电分析化学与生物传感技术.
引用该论文: YANG Ping-hua,QIAO Bo,CHEN Xiao-yan,TAO Chun-yuan,CHEN Fu-shan. Preparation of a Novel Modified Electrode and Its Application to the Determination of p-Benzenediol with High Selectivity[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(6): 443～446
杨平华,乔波,陈小艳,陶春元,陈福山. 一种新的修饰电极的制备及其应用于对苯二酚的高选择性测定[J]. 理化检验－化学分册, 2007, 43(6): 443～446
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【3】Nagaraja P,Vasantha R A,Sunitha K R.A sensitive and selective spectrophotometric estimation of catechol derivatives in pharmaceutical preparations[J].Talanta,2001,55:1039-1046．
【4】Rosangela M de Carvalho,Cesar Mello1,Lauro T,et al.Simultaneous determination of phenol isomers in binary mixtures by differential pulse voltammetry using carbon fibre electrode and neural network with pruning as a multivariate calibration tool[J].Anal Chim Acta,2000,420:109-121．
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【6】Eric Bakker.Electrochemical sensors[J].Anal Chem,2004,76:3285-3298．
【7】Ray E Clement,Paul W Yang,Carolyn J Koester.Environmental analysis[J].Anal Chem,2001,73:2761-2790．
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