Author(s)

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.

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.

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

R. Aglan, G. Mohamed and H. Mohamed, "Chemically Modified Carbon Paste Electrode for Determination of Cesium Ion by Potentiometric Method," American Journal of Analytical Chemistry, Vol. 3 No. 8, 2012, pp. 576-586. doi: 10.4236/ajac.2012.38076.