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研究论文

多壁碳纳米管修饰酶电极测定马拉硫磷

  • 张璐 ,
  • 张耀东 ,
  • 漆红兰
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  • 陕西省生命分析化学重点实验室陕西师范大学化学与材料科学学院,陕西省生命分析化学重点实验室陕西师范大学化学与材料科学学院,陕西省生命分析化学重点实验室陕西师范大学化学与材料科学学院 陕西西安710062,陕西西安710062,陕西西安710062

收稿日期: 2007-11-28

  修回日期: 2007-11-28

  网络出版日期: 2007-11-28

Determination of Malathion Based on Carbon Nanotubes Modified Electrode Incorporating Acetylcholinesterase

  • ZHANG Lu ,
  • ZHANG Yao-dong ,
  • QI Hong-lan
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  • (Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province,`Shaanxi Normal University,Xi'an,710062

Received date: 2007-11-28

  Revised date: 2007-11-28

  Online published: 2007-11-28

摘要

应用化学交联法将巴西日圆线虫乙酰胆碱酯酶(AChE)固定于多壁碳纳米管修饰的玻碳电极表面,制备用于有机磷农药检测的电化学生物传感器.研究了巯基胆碱(TCh)在该修饰电极上的电化学行为.优化实验条件得出,响应电流与马拉硫磷的浓度在6.0×10-10~6.0×10-9mol.L-1范围内呈良好的线性关系,检出限为1.0×10-10mol.L-1.测定了湖水中马拉硫磷的含量,回收率为97%~105%.

本文引用格式

张璐 , 张耀东 , 漆红兰 . 多壁碳纳米管修饰酶电极测定马拉硫磷[J]. 电化学, 2007 , 13(4) : 431 -435 . DOI: 10.61558/2993-074X.1848

Abstract

A biosensor for determination of organophosphorus pesticide based on the acetylcholinesterase and multi-wall carbon nanotubes modified electrode is fabricated.Under the optimal conditions,the chronoamperometric current at +0.70V(vs.SCE) increased linearly with the concentration of malathion in the range from 6.0×10-10 to 6.0×10-9 mol·L-1 with a detection limit of 1.0×10-10 mol·L-1.The recoveries of malathion in lake water is 97% to 105% determinated by this method.

参考文献

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