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Journal of Chemistry
Volume 2013, Article ID 189464, 7 pages
http://dx.doi.org/10.1155/2013/189464
Research Article

Mg(II) Selective PVC Membrane Electrode Based on Methyl Phenyl Semicarbazone as an Ionophore

1Department of Chemistry, Zakir Husain College, University of Delhi, J. L. Nehru Marg, New Delhi 110002, India
2Department of Applied Chemistry, MAIT, GGSIP University, Sector 22, Rohini, New Delhi 110085, India

Received 27 June 2012; Revised 11 October 2012; Accepted 16 October 2012

Academic Editor: Tingyue Gu

Copyright © 2013 Sulekh Chandra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A PVC-membrane-based Mg(II) selective electrode was constructed using methyl phenyl semicarbazone (MPS) as a neutral carrier. The sensor exhibits a Nernstian response for Mg(II) ion over a wide concentration range   to    M with the slope of 28.4 mV/per decade having detection limit  M. It was relatively a fast response time (  s for concentration and  s for concentration of  M) and can be used for 8 months without any considerable divergence in potentials. The proposed sensor revealed relatively good selectivity and high sensitivity for Mg(II) over a mono-, di-, and trivalent cation and can be used in a pH range of 1.0–9.5. It was also successfully used as an indicator electrode in potentiometer titration and in the analysis of concentration of magnesium in various real samples.