Molecularly imprinted polyaniline molecular receptor�based chemical sensor for the electrochemical determination of melamine

Regasa, MB and Soreta, TR and Femi, OE and Ramamurthy, PC and Kumar, S (2020) Molecularly imprinted polyaniline molecular receptor�based chemical sensor for the electrochemical determination of melamine. In: Journal of Molecular Recognition .

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Abstract

Molecularly imprinted polymer-modified glassy carbon electrode (GCE)-based electrochemical sensor is prepared using the electropolymerization of aniline in the presence of melamine (MA) as a template. In this work, the advantages of molecularly imprinted conducting polymers (MICPs) and electroanalytical methods were combined to obtain an electronic device with better performances. The sensor performance was evaluated by cyclic voltammetry (CV) and square wave voltammetry (SWV) with the linear range of 0.6-16 � 10�9M, quantification limit of 14.9 � 10�10M, and detection limit of 4.47 � 10�10M (S/N = 3). The selectivity of the sensor was tested in the presence of acetoguanamine (AGA), diaminomethylatrazine (DMT), casein, histidine, and glycine interfering molecules taken at the triple concentration with MA that demonstrated too small current response compared with that of the analyte indicating high specificity of the sensor towards the template. The sensor was successfully applied to determine MA in infant formula samples with significant recovery greater than 96 and relative standard deviation (RSD) less than 4.8. Moreover, the good repeatability, recyclability, and stability make this sensor device promising for the real-time monitoring of MA in different food stuffs.

Item Type:	Journal Article
Publication:	Journal of Molecular Recognition
Publisher:	John Wiley and Sons Ltd
Additional Information:	Copyright for this article belongs to Wiley
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Jun 2020 11:06
Last Modified:	09 Jun 2020 11:06
URI:	http://eprints.iisc.ac.in/id/eprint/64602

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