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Title: A polystyrene based heterogeneous solid membrane of cerium{IV) selenite as sensor for Hg(II) ions
Authors: Jain, A K
Gupta, V K
Singh, L P
Issue Date: Jul-1995
Publisher: NISCAIR-CSIR, India
Abstract: 10 and 20% (w/w) polystyrene based heterogeneous membranes of cerium (IV) selenite have been used as Hg2+ -ion selective electrodes. The electrodes have useful working concentration range of 1 x 10-4 -1 x 10-1M and 1 x 10-4-5 x 10-2M with a Nernstian and near Nernstian slope of 29 and 28 mV per decade of concentration, respectively. Both the membranes generate reproducible potential and have small response time. They are mechanically and chemically stable and used over a period of four months. The useful working pH range is 2.8-4.2 and the membranes also work satisfactorily in partially non-aqueous media. The electrodes show good selectivity for Hg2+ ions over a number of bivalent and polyvalent cations and can, therefore, be used for its estimation in presence of interfering ions present in amounts not exceeding Hg2+ ion concentration.
Page(s): 189-192
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.02(4) [July 1995]

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