Chemically Modified Carbon Paste Electrode for Determination of Cesium Ion by Potentiometric Method

Refat F. Aglan, Gehad G. Mohamed, Hala A. Mohamed

Chemistry Department, Faculty of Science, Cairo University, 12613 Giza, Egypt.
Hot Laboratories Center, Atomic Energy Authority, 13759, Cairo, Egypt.

DOI: 10.4236/ajac.2012.38076                

Abstract

A new chemically modified carbon paste electrode for cesium(I) ion determination based on potassium zinc hexacyan-oferrate (PZHCF) as an ionophore was prepared. The electrode exhibits a Nernstian response for Cs(I) ions over a wide concentration range from 1 × 10^-6 to 1 × 10^-1 mol·L^-1 with a slope of 58 ± 0.5 mV·decade^-1. It has a response time of about 35 s and can be used for a period of 3 months with good reproducibility. Detection limit obtained in the optimal conditions was 3 × 10^-7 mol·L^-1. The potentiometric response is independent of the pH of the solution in the pH range 4.0 - 8.0. The electrode possesses the advantages of low resistance, fast response over a variety of other cations. The proposed electrode is applied as a sensor for the determination of Cs(I) ion concentration in different samples solutions. The results showed a good correlation with the data obtained by atomic absorption spectrometric method.

Keywords

Cesium Determination; Modified Ion Selective Electrode; Potassium Zinc Hexacyanoferrate Ionophore

Conflicts of Interest

The authors declare no conflicts of interest.

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