Journal article
Response of a copper(II) and iron(III) ion-selective electrode bielectrode array in saline media
Talanta, Vol.75(5), pp.1234-1239
2008
Abstract
A bielectrode array comprising a jalpaite membrane (i.e., Ag1.5Cu0.5S) copper(II) ion-selective electrode (ISE) and chalcogenide glass membrane (i.e., Fe2.5(Se60Ge28Sb12)97.5) iron(III) ISE has been assembled by individually wiring each solid-state sensor into a single electrode body. Furthermore, a dual metal ion buffer calibration standard incorporating copper(II) and iron(III) coordinating ligands to regulate the levels of free copper(II) and iron(III) in the buffer has been developed to enable simultaneous calibration of the bielectrode ISE array. In this work, the bielectrode ISE array has been employed in the continuous flow analysis (CFA) of free copper(II) and iron(III) in seawater media. It is shown that the individual electrodes displayed Nernstian response in the metal ion buffer calibration standard over a wide dynamic range (viz., 10-15 to 10-5M aCu2+ and 10-21 to 10-11M aFe3+), and the results of repetitive CFA analyses of free copper(II) and iron(III) in seawater are commensurate with the typical values found in coastal seawater samples. Clearly, the bielectrode ISE array may be used in the simultaneous analysis of free copper(II) and iron(III) in seawater without fear of cross-interference between the solid-state sensors.
Details
- Title
- Response of a copper(II) and iron(III) ion-selective electrode bielectrode array in saline media
- Authors
- Roland De Marco (Author) - Curtin University of TechnologyJ Martizano (Author) - Curtin University of Technology
- Publication details
- Talanta, Vol.75(5), pp.1234-1239
- Publisher
- Elsevier BV
- Date published
- 2008
- DOI
- 10.1016/j.talanta.2008.01.018
- ISSN
- 0039-9140
- Copyright note
- Copyright © 2008. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99449839902621
- Output Type
- Journal article
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- Web Of Science research areas
- Chemistry, Analytical