Preparation of Electrochemical Sensor Modified by Molecularly Imprinted Nano-porous Film for Melamine Determination

FOOD SCIENCE ›› 0, Vol. ›› Issue (): 214-218.

Preparation of Electrochemical Sensor Modified by Molecularly Imprinted Nano-porous Film for Melamine Determination

Received:2011-03-24 Revised:2012-02-09 Online:2012-02-25 Published:2012-02-14
Contact: jin guanping E-mail:jgp@hfut.edu.cn

Abstract

Abstract: A molecularly imprinted nano-porous film for melamine adsorption was electrochemically generated in situ on a paraffin-impregnated graphite electrode with a melamine/chitosan/nano-silver/polyquercetin complex. The film displayed a 3D network structure as characterized using field emission scanning electron microscopy, X-ray photoelectron spectroscopy, infrared spectroscopy and electrochemical techniques. The modified electrode exhibited a highly selective enrichment for melamine. Oxidation peak current and melamine concentration in the range of 1 × 10-7 －1 × 10-5 mol/L showed an excellent linear relationship. The detection limit of the method was 1 × 10-8 mol/L (3σ). The modified electrode had excellent anti-interference performance and allowed the determination of melamine in milk.

Key words: molecularly imprinted nano-porous film, sensor, electrochemistry, melamine

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Preparation of Electrochemical Sensor Modified by Molecularly Imprinted Nano-porous Film for Melamine Determination

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