Dysprosium selective potentiometric membrane sensor |
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Authors: | Hassan Ali Zamani Farnoush Faridbod Mohammad Reza Ganjali |
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Affiliation: | 1. Department of Applied Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran;2. Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran |
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Abstract: | A novel Dy(III) ion-selective PVC membrane sensor was made using a new synthesized organic compound, 3,4-diamino-N′-((pyridin-2-yl)methylene)benzohydrazide (L) as an excellent sensing element. The electrode showed a Nernstian slope of 19.8 ± 0.6 mV per decade in a wide concentration range of 1.0 × 10? 6–1.0 × 10? 2 mol L? 1, a detection limit of 5.5 × 10? 7 mol L? 1, a short conditioning time, a fast response time (< 10 s), and high selectivity towards Dy(III) ion in contrast to other cations. The proposed sensor was successfully used as an indicator electrode in the potentiometric titration of Dy(III) ions with EDTA. The membrane sensor was also applied to the F– ion indirect determination of some mouth washing solutions and to the Dy3 + determination in binary mixtures. |
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