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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3015
Title: Neutral carriers based polymeric membrane electrodes for selective determination of mercury (II)
Authors: Gupta V.K.
Singh A.K.
Al Khayat M.
Gupta B.
Published in: Analytica Chimica Acta
Abstract: The potentiometric response characteristics of mercury ion-selective membrane electrodes based on 2-amino-6-purinethiol (I1) and 5-amino-1, 3, 4-thiadiazole-2-thiol (I2) were described. Ion selectivities were tested for various plasticizers, which were used as solvent mediators to incorporate the ionophores into the membrane. Effects of experimental parameters such as membrane composition, nature and amount of plasticizers and additives, pH and concentration of internal solution on the potential response of Hg2+ electrodes were investigated. The best performance was obtained with the electrode having a membrane composition (w/w) of (I1) (3.17%): PVC (31.7%): DOP (dioctylpthalate) (63.4%): NaTPB (sodium tetraphenylborate) (1.58%). The proposed electrode reveals a Nernstian response over Hg2+ ion in the concentration range of 7.0 × 10-8-1.0 × 10-1 M with limit of detection 4.4 × 10-8 M. The electrode shows good discrimination toward Hg2+ ion with respect to most common cations. It shows a short response time (10 s) for whole concentration range and can be used for 2 months without any considerable divergence in potentials. For evaluation of the analytical applicability, the electrode was used in the determination of Hg2+ ion in different environmental and biological samples. The practical utility of the membrane electrode has also been observed in the presence of surfactants. © 2007 Elsevier B.V. All rights reserved.
Citation: Analytica Chimica Acta (2007), 590(1): 81-90
URI: https://doi.org/10.1016/j.aca.2007.03.014
http://repository.iitr.ac.in/handle/123456789/3015
Issue Date: 2007
Keywords: Ion-selective electrodes
Mercury
Neutral ionophore
Poly (vinylchloride) membranes
ISSN: 32670
Author Scopus IDs: 7403420647
57209223382
8296831300
7402195167
Author Affiliations: Gupta, V.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India
Singh, A.K., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India
Al Khayat, M., Department of Basic Sciences, University of Sharjah, United Arab Emirates
Gupta, B., Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India
Funding Details: One of the authors Barkha Gupta is gratefully acknowledge to Ministry of Human Resource Development (MHRD), New Delhi, India for financial support.
Corresponding Author: Gupta, V.K.; Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee, 247667, India; email: vinodfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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