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Reference type: Journal
Authors: Xu GL, Zhang HL, Zhong M, Zhang TT, Lu XJ, Kan XW
Article Title: Imprinted sol-gel electrochemical sensor for melamine direct recognition and detection.
Publication date: 2014
Journal: Journal of Electroanalytical Chemistry
Volume: 713
Page numbers: 112-118.
DOI: 10.1016/j.jelechem.2013.12.004
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1572665713005481

Abstract: A sol-gel based electrochemical sensor was developed for melamine (Mel) direct and selective detection in real samples. Thin film of molecularly imprinted sol-gel polymers with specific binding sites for Mel was fabricated on glassy carbon electrode surface by electropolymerization method. Oxidation peak of Mel was chosen as a detected signal for the properties study of the sensor. The molecularly imprinted polymers film modified method, electropolymerization scan rate, scan cycles, potential range, amount of Mel and extraction conditions for sensor preparation were optimized. Under the optimized conditions, the sensor displayed an excellent recognition capacity towards Mel compared with other structural similar molecules. With acceptable regeneration and stability the sensor could detect Mel in the range of 6.3 x 10-7 - 1.1 x 10-4 mol L-1 with a detected limit of 6.8 x 10-8 mol L-1 (S/N = 3). The result of real samples detection indicated that the proposed low cost electrochemical sensor might be potential to determine Mel in real samples to ensure food safety
Template and target information: melamine, Mel
Author keywords: Electrochemical sensor, Molecularly imprinted polymers, Sol-gel film, Melamine, Recognition


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