Iodide selective membrane electrode based on copper (Π)-bis-Nphenilsalicyldenaminato complex

Subject Areas : Journal of the Iranian Chemical Research

Ali Benvidi ¹ (Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran)
Mehdi Elahizadeh ² (Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran)
Hamid Reza Zare, ³ (Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran)
Rasoul Vafazadeh ⁴ (Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran)

Received: 2008-06-06 Accepted : 2008-12-25 Published : 2008-12-31

Keywords: Potentiometry, Iodide ion-selective electrode, PVC membrane, copper(Π)-bis-Nphenilsalicyldenaminato complex,

Abstract :

An iodide ion-selective PVC membrane sensor based on copper (Π)-bis-Nphenilsalicyldenaminatocomplex as a novel sensing material is successfully developed. Theelectrode showed a good selectivity for iodide ion with respect to common inorganic anions. Thesensor exhibited a good linear response with slope of _58.6 ± 0.4 mV per decade over theconcentration range of 5.0 × 10-6 to 1.0 × 10-1 mol L-1, and a detection limit of 3.0 × 10-6 mol L-1of I– ion. The electrode response was independent of pH in the range of 3.0 - 10.0. The proposedsensor was applied as an indicator electrode in potentiometric titration of I– with Ag+ ion, and todetermine the iodide in sodium chloride salt.

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