食品科学 ›› 2012, Vol. 33 ›› Issue (4): 214-218.doi: 10.7506/spkx1002-6630-201204045

• 分析检测 • 上一篇    下一篇

类分子印迹纳米多孔膜修饰电极制备三聚氰胺电化学传感器

赵 畅,余 波,陈振兴,晋冠平   

  1. 1.合肥工业大学化工学院应用化学系 2.可控化学与材料化工安徽省重点实验室
  • 出版日期:2012-02-25 发布日期:2012-02-14
  • 基金资助:
    国家自然科学基金面上项目(NSFC, 21076054);教育部留学回国科研启动基金项目(2009JYLH0522); 安徽省教育厅自然科学重点项目(2009AJZR0596);合肥工业大学创新实验项目(2010-37)

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

ZHAO Chang,YU Bo,CHEN Zhen-xing,JIN Guan-ping   

  1. 1. Department of Application Chemistry, School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei 230009, China
  • Online:2012-02-25 Published:2012-02-14

摘要: 采用电化学法在充蜡石墨电极上,原位修饰了一种基于三聚氰胺/纳米银/聚槲皮素的类分子印迹-纳米多孔膜。场发射扫描电镜、X-射线光电子能谱、红外光谱和电化学验证了该类分子印迹-纳米多孔膜为三维网状结构。该纳米多孔膜修饰电极对三聚氰胺显示良好的选择性富集作用,氧化峰(0.17V)电流和三聚氰胺的浓度在1×10-7~1×10-5mol/L范围内,呈良好线性关系,检出限为1×10-8mol/L(3σ)。该修饰电极有较好的抗干扰能力,可用于牛奶样品中三聚氰胺的测定。

关键词: 类分子印迹纳米多孔膜, 传感器, 电化学, 三聚氰胺

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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