Highly selective iodide membrane electrode based on a cerium salen. |
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| Authors: | Mohammad Reza Ganjali Tahereh Poursaberi Morteza Hosseini Masoud Salavati-Niasary Mohammad Yousefi Mojtaba Shamsipur |
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| Institution: | Department of Chemistry, Tehran University, Iran. Ganjali@khayam.ut.ac.ir |
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| Abstract: | A highly selective PVC membrane electrode based on a cerium-salen complex was prepared. The sensor displays an anti-Hofmeister selectivity sequence with a preference for iodide ion over many common organic and inorganic anions. The proposed electrode exhibits a near-Nernstian behavior over a wide concentration range (5.0 x 10(-2) - 8.0 x 10(-6) M) with a slope of 57.5 mV per decade, and a detection limit of 6.0 x 10(-6) M. The electrode has a very fast response time and can be used in the pH range of 3.0 - 1 1.0. It was applied, as an indicator electrode, in potentiometric titration of Ag+ ions. |
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