期刊论文

中文

分析试验室

1000-0720

2011

30

9

66-70

10.13595/j.cnki.issn1000-0720.2011.0253

湖南省自科基金项目（10JJ3024）资助；

本校为其他机构

用循环伏安法（CV）、线性扫描溶出伏安法（LSSV）研究了甲基对硫磷（MPT）在聚噻吩/纳米二氧化钛修饰玻碳电极（PTh-NTiO2/GCE）上的电化学行为。实验表明,该修饰电极能显著提高MPT的氧化还原峰电流,在B-R缓冲溶液（pH 5.72）中,于-0.662V（vs.SCE）处产生灵敏的不可逆还原峰,其峰电流与MPT浓度在0.100～3.00μg/mL范围内呈良好的线性关系（r=0.9989）,检测限达50.0 ng/mL（S/N=3）。在0.500μg/mL MPT溶液中连续扫描11次,RSD=2.0%。用此方法测定了蔬菜、果皮及水样中MPT。

The electrochemical behaviors of methyl parathion（MPT） on a polythiophene-nano titanium dioxide film modified glassy carbon electrode（PTh-NTiO2/GCE） were investigated by cyclic voltammetry（CV） and linear sweep stripping voltammetry（LSSV）.The experimental results showed that the redox peak currents of MPT remarkably increased at the modified electrode.In B-R buffer solution（pH 5.72）,a sensitive irreversible reduction peak was observed at-0.662V（vs.SCE） and there was an excellent linear relationship between the reduction peak current ...