Electrocatalytic Reduction of Free Chlorine at an N,N-Diethylaniline-grafted Carbon Electrode for Improved Sensitivity in Amperometric Detection

Kotaro MORITA; Naoki HIRAYAMA

doi:10.2116/analsci.33.5

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Electrocatalytic Reduction of Free Chlorine at an N,N-Diethylaniline-grafted Carbon Electrode for Improved Sensitivity in Amperometric Detection

Kotaro MORITA, Naoki HIRAYAMA

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Keywords: Free chlorine, electrode grafting, N,N-diethyl-p-phenylenediamine, amperometry

JOURNAL FREE ACCESS

2017 Volume 33 Issue 1 Pages 5-7

DOI https://doi.org/10.2116/analsci.33.5

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Abstract

The electrocatalytic activity of an N,N-diethylaniline-grafted carbon (DEA/PFC) electrode was utilized to improve the sensitivity in the cathodic detection of free chlorine. Voltammetric curves showed a well-defined cathodic peak of free chlorine on DEA/PFC, lowering the overlap with that of dissolved oxygen. Amperometric measurements were applied for the determination of free chlorine for a concentration range of 4 orders of magnitude. The results showed that measurements of the amperometric response with DEA/PFC can be used as the basis for a simple, accurate, and rapid method to determine free chlorine.

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