用印迹聚合膜修饰电极循环伏安法间接测定除草剂苄嘧磺隆  

Indirect CV Determination of the Herbicide Bensuifuron-Methyl with the Modified Electrode MIP/MWCNT's/GCE

作　　者：张进[1] 徐海丽[1] 周权宝[1] 田浪[1] 

机构地区：[1]贵州师范学院化学与生命科学学院,贵阳550018

出　　处：《理化检验（化学分册）》2013年第9期1029-1033,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：贵州省科学技术基金资助项目(J20102120);贵州省特色重点学科建设项目(2012442);贵州省自然科学招标项目(2012052)

摘　　要：以苄嘧磺隆(BSM)为模板分子,邻氨基苯酚为功能单体,用循环伏安法(CV)使聚合膜在多壁碳纳米管修饰的玻破电极(MWCNT's/GCE)表面沉积,制备了对BSM具有特异识别能力的分子印迹电化学传感器(MIECS)。以K_3Fe(CN)_6为电化学探针,提出了用循环伏安法测定苄喀磺隆的含量。结果表明:其氧化峰电流间接地与BSM的浓度在0.5~150μmol·L^(-1)范围内呈线性关系,检出限(3S/N)为0.17μmol·L^(-1)。用此法分析了农田水样,测得BSM含量与高效液相色谱法测得结果相符;用标准加入法测得回收率在95.3%~97.2%之间。A MIECS with specific discernment to bensulfuron-methyl （BSM）, was prepared by CV to deposite the electropolymericed membrane onto the surface of MWCNT＇s/GCE, using BSM as template molecule, and o-aminophenol as functional monomer. A method for determination of bensulfuron-methyl was proposed via measuring the cyclic voltammetry （CV） response of K3Fe（CN）6, which was used as electrochemical probe, at the modified electrode, and values of change in oxidative peak current was found to keep linear relationship indirectly with the concentration of BSM in the range of 0. 5 150 μmol ·L-1, with detection limit （3S/N） of 0. 17 μmol ·L -1 This method was applied to the analysis of farmland water sample, contents of BSM obtained by this method was found to conform with the results obtained by HPLC. Values of recovery found by standard addition method were in the range of 95. 3%-97. 2%.

关 键 词：循环伏安法 多壁碳纳米管 分子印迹聚合膜 玻碳电极 苄嘧磺隆 

分 类 号：O657.1[理学—分析化学]