Ahmad M. Mohammad Alakraa

Citation:

Awad, M. I., A. M. Mohammad, and T. Ohsaka, "Electroanalysis of a Ternary Disinfectant Mixture", Analytical Letters, vol. 45, issue 11, pp. 1506 - 1518, 2012.

Abstract:

The analysis of a ternary mixture containing ozone (O 3), sodium hypochlorite (NaClO), and hydrogen peroxide (H 2O 2), in their coexistence was simultaneously performed using a potentiometric method. In this method, the change in the open circuit potential of a Pt indicator electrode dipped in a potential buffer containing I -/I 3 - upon the addition of the ternary mixture is measured. The analysis was based on the different reaction kinetics of the three oxidants with I -. The kinetics of the reaction of O 3 and I - is about three orders of magnitude faster than that of sodium hypochlorite, and the reaction of hydrogen peroxide and I - is negligible compared with those of O 3 or hypochlorite ion and I - unless a molybdate catalyst is added. Several factors, including the iodide concentration, pH, and the molybdate concentration were investigated to optimize the analysis and achieve a reasonable separation among the reactions of the three oxidants and I -. A theoretical model was developed to compare with the experimental results and a reasonable correlation was obtained. © 2012 Copyright Taylor and Francis Group, LLC.

Notes:

Export Date: 28 February 2016CODEN: ANALBCorrespondence Address: Ohsaka, T.; Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan; email: ohsaka@echem.titech.ac.jpReferences: Awad, M.I., Ohsaka, T., Potentiometric analysis of peroxyacetic acid in the presence of a large excess of hydrogen peroxide (2003) J. Electroanal. Chem., 544, pp. 35-40;Awad, M.I., Ohsaka, T., Electroanalysis of peroxone (2004) Electrochem. Comm., 6, pp. 1135-1140;
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