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Molecularly imprinted polymer electrochemiluminescence sensor for sensitive and selective detection of chlorpyrifos

Authors :
ZHANG Tianxin
LIU Yiming
YANG Minli
Source :
Journal of Shanghai Normal University (Natural Sciences), Vol 50, Iss 6, Pp 697-705 (2021)
Publication Year :
2021
Publisher :
Academic Journals Center of Shanghai Normal University, 2021.

Abstract

Graphite carbon nitride nanosheets (g-C3N4NSs) exhibite excellent electrochemiluminescence (ECL) performance and good film-forming properties. In this paper, g-C3N4NSs were used as an ECL material to be fixed on a glassy carbon electrode(GCE). A molecularly imprinted polymer (MIP) was prepared by molecular self-assembly with chlorpyrifos (CPF) as template molecule and methacrylic acid (MAA) as functional monomer. The polymer was then introduced into g-C3N4NSs modified electrode to construct a MIP-ECL sensor. After removing the template molecule, the sensor can specifically recognize CPF. Based on the specific recognition and quenching effect of CPF on the ECL signal of g-C3N4NSs, the high sensitive and selective detection of CPF was achieved. The sensor shows a linear response to CPF in range of 1.0×10-8-1.0×10-4 mol·L-1 and limit of detection (LOD) of 5.0 nmol·L-1. It was used to detect CPF residues in vegetables and the results were satisfactory.

Details

Language :
English
ISSN :
10005137
Volume :
50
Issue :
6
Database :
OpenAIRE
Journal :
Journal of Shanghai Normal University (Natural Sciences)
Accession number :
edsair.doajarticles..d433c5dde97593233929918bc810ec21