Singh, Krishna Pal and Ahalawat, Saurabh and Prajapati, Ramesh Kumar and Kumar, Satish and Singh, Prashant and Dhawan , Sandeef Kumar (2010) Electrochemical sensing for the detection of 2,4-dichlorophenoxy acetic acid using molecularly imprinted polymer membrane. Ionics , 16 (6). pp. 529-537. ISSN 1862-0760

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Abstract

Molecularly imprinted polymer (MIP) membranes were used to develop highly sensitive chemical sensors for the detection of herbicide 2,4-dichlorophenoxy acetic acid (2,4-D). The 2,4-D imprinted composite MIP membranes were prepared, and the characterization was done by UV-VIS spectrophotometer, Fourier transform infrared spectroscopy, and scanning electron microscopy, and the same were fitted in a new electrochemical sensor model. Membrane electroconductivity measurements were performed by applying a small-amplitude alternating voltage (20 mV) with a varying frequency from 20 Hz to 80 kHz generated by a lowfrequency wave form generator. The measured changes in the membrane ionic/electric conductivity as a function of 2,4-D concentration was allowed to evaluate the recognition properties of the prepared membrane. This sensor is useful in detecting 2,4-D herbicide having concentration range 10-3M to 10-6M. The cross-selectivity of the sensor, reproducibility of results, and reusability of MIP membrane were examined and found remarkable and recommendable.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Springer-Verlag 2010.
Uncontrolled Keywords:	Electroconductometric; Sensor; 2,4-D; Membrane; MIP
Subjects:	Chemistry Electrochemistry Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	12 Apr 2012 08:04
Last Modified:	12 Apr 2012 08:04
URI:	http://npl.csircentral.net/id/eprint/121

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