Sensitive and selective detection of the highly toxic pesticide carbofuran in vegetable samples by a molecularly imprinted electrochemical sensor with signal enhancement by AuNPs

被引：20

作者：

Qi, Peipei ^{[1
,2
,3
,4
]}

Wang, Jiao ^{[1
,2
,3
,4
]}

Wang, Xiangyun ^{[1
,2
,3
,4
]}

Wang, Zhiwei ^{[1
,2
,3
,4
]}

Xu, Hao ^{[1
,2
,3
,4
]}

Di, Shanshan ^{[1
,2
,3
,4
]}

Wang, Qiang ^{[1
,2
,3
,4
]}

Wang, Xinquan ^{[1
,2
,3
,4
]}

机构：

[1] Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, Hangzhou 310021, Zhejiang, Peoples R China

[2] State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Zhejiang, Peoples R China

[3] Agr Minist, Key Lab Pesticide Residue Detect, Hangzhou 310021, Zhejiang, Peoples R China

[4] Key Lab Detect Pesticide Residues & Control Zheji, Hangzhou 310021, Zhejiang, Peoples R China

来源：

RSC ADVANCES | 2018年 / 8卷 / 45期

基金：

中国国家自然科学基金;

关键词：

CARBAMATE PESTICIDES; GOLD NANOPARTICLES; MODIFIED ELECTRODE; CARBON NANOTUBES; POLYMER; IMMUNOSENSOR; ACID; FILM; RECOGNITION; POLYPYRROLE;

D O I：

10.1039/c8ra05022h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An imprinted electrochemical sensor was constructed for the detection of carbofuran with high sensitivity and selectivity. AuNPs were used as the electron wire for signal amplification, and molecularly imprinted polymer was used as the recognition element. The preparation process of the modified electrode was optimized, and the electrode was characterized using scanning electron microscopy, cyclic voltammetry and differential pulse voltammetry. The results proved that the prepared sensor can selectively detect carbofuran and the AuNPs can increase its sensitivity. The method validation included the systematic evaluation of the linearity, sensitivity, selectivity, reproducibility and stability. The optimized sensor showed a wide linear response to carbofuran in the range from 5.0 x 10(-8) to 4.0 x 10(-4) mol L-1 with a low detection limit of 2.4 x 10(-8) mol L-1. The sensor also exhibited a high selectivity to carbofuran. The real sample analysis for vegetable samples suggested its potential application in the analysis of vegetable samples.

引用

页码：25334 / 25341

页数：8

共 31 条

[1] Amperometric tyrosinase based biosensor using an electropolymerized phosphate-doped polypyrrole film as an immobilization support. Application for detection of phenolic compounds [J].