@article {107648, title = {Electroanalysis of a Ternary Disinfectant Mixture}, journal = {Analytical Letters}, volume = {45}, year = {2012}, note = {

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}, month = {2012}, pages = {1506 - 1518}, 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. {\textcopyright} 2012 Copyright Taylor and Francis Group, LLC.

}, keywords = {Electroanalysis, Hypochlorite, Ozone, Peroxide, Potentiometry}, isbn = {00032719 (ISSN)}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84864649871\&partnerID=40\&md5=f13645fbb9a870ff59b06fded5a384ef}, author = {M.I. Awad and Mohammad, A. M. and T. Ohsaka} }