Electrochemical determination of paraquat using a DNA-modified carbon ionic liquid electrode

被引：28
|
作者：
Mai, Nannan [1 ]
Liu, Xiaoying [1 ]
Wei, Wanzhi [1 ]
Luo, Shenglian [1 ]
Liu, Wei [1 ]
机构：
[1] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China
来源：
MICROCHIMICA ACTA | 2011年 / 174卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
Carbon ionic liquid electrode; DNA; Differential pulse voltammetry; Electrochemistry deposition; Paraquat; SQUARE-WAVE VOLTAMMETRY; CLAY-MODIFIED ELECTRODE; PASTE ELECTRODE; PARKINSONS-DISEASE; GRAPHITE ELECTRODE; MASS-SPECTROMETRY; METHYL VIOLOGEN; WATER; CHROMATOGRAPHY; PESTICIDE;
D O I：
10.1007/s00604-011-0602-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Deoxyribonucleic acid (DNA) was electrochemically deposited on a carbon ionic liquid electrode to give a biosensor with excellent redox activity towards paraquat as shown by cyclic voltammetry and differential pulse voltammetry. Experimental conditions were optimized with respect to sensing paraquat by varying the electrochemical parameters, solution pH, and accumulation time of DNA. Under the optimized conditions, a linear relation exists between the reduction peak current and the concentration of paraquat in the range from 5 x 10(-8) mol L(-1) to 7 x 10(-5) mol L(-1), with a detection limit of 3.6 x 10(-9) mol L(-1). The utility of the method is illustrated by successful analysis of paraquat in spiked real water samples.
引用
收藏
页码：89 / 95
页数：7
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