Abstract
This paper describes a potassium ion-selective electrode based on 2,2-dithiodibenzoic acid with a focus on the sub-Nernstian response characteristics. The topics including the experimental parameters that influence the response of the electrode, useful membrane compositions and applications were investigated. The membrane electrode demonstrate linear (R2= 0.999) sub-Nernstian responses, with the slop of 40.12 ± 0.15 mV/decade, toward potassium(I) ions over the range of 1.0 x 10– 5 to 1.0 M. The prepared electrode, with detection limit of 6.2 x 10-6 M, was successfully applied in the direct potentiometric measurement of sub-milimolar quantities of K+ in aqueous solutions. The results were compared with atomic absorption spectrometry measurements. There was good agreement between the results from the proposed electrode and those from the standard method.
Keywords: 2,2'-Dithiodibenzoic acid, Potassium-selective electrode, Potentiometry, PVC-membrane
Current Analytical Chemistry
Title: Development and Characterization of a New PVC-Membrane Electrode for Selective Sensing of K+ Ion
Volume: 6 Issue: 2
Author(s): Abdollah Yari and Sedigheh Azizi
Affiliation:
Keywords: 2,2'-Dithiodibenzoic acid, Potassium-selective electrode, Potentiometry, PVC-membrane
Abstract: This paper describes a potassium ion-selective electrode based on 2,2-dithiodibenzoic acid with a focus on the sub-Nernstian response characteristics. The topics including the experimental parameters that influence the response of the electrode, useful membrane compositions and applications were investigated. The membrane electrode demonstrate linear (R2= 0.999) sub-Nernstian responses, with the slop of 40.12 ± 0.15 mV/decade, toward potassium(I) ions over the range of 1.0 x 10– 5 to 1.0 M. The prepared electrode, with detection limit of 6.2 x 10-6 M, was successfully applied in the direct potentiometric measurement of sub-milimolar quantities of K+ in aqueous solutions. The results were compared with atomic absorption spectrometry measurements. There was good agreement between the results from the proposed electrode and those from the standard method.
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Cite this article as:
Yari Abdollah and Azizi Sedigheh, Development and Characterization of a New PVC-Membrane Electrode for Selective Sensing of K+ Ion, Current Analytical Chemistry 2010; 6 (2) . https://dx.doi.org/10.2174/157341110790945490
DOI https://dx.doi.org/10.2174/157341110790945490 |
Print ISSN 1573-4110 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6727 |
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