Nanoalumina Modified Carbon Paste Electrode for Sensitive and Rapid Determination of Hypochlorite Ion by Differential Pulse Voltammetry

Document Type: Research Paper

Authors

Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran

Abstract

An anodic stripping differential pulse voltammetric method was proposed for rapid and sensitive determination of hypochlorite ion. A modified electrode was prepared by modification of carbon paste using alumina nanopowder . The method that is rapid, simple and accurate is based on the electrooxidation hypochlorite ion accumulated at the elexctrode urface. Nanoalumina modification increased the oxidation peak current for hypochlorite ion. The effects of different parameters on the electrode response were studied and the optimum condition was established. The response of the sensor was linear in the range 0.1-800 μg mL-1 of hypochlorite ion, with a correlation coefficient of 0.9992 at the optimum condition. The limit of detection was obtained as 0.025 μg mL-1. The effects of some cations, anions and organic species, which may coexist with hypochlorite ion in real samples, on the current response of hypochlorite, were investigated. The investigated chemical species do not interfere. Hypochorite ion in water and dairy product samples was successfully determined using the proposed electrode.

Keywords


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