Differential Pulse Voltammetric Determination of Free Chlorine for Water Disinfection Process

The electrochemical detection of free chlorine based on the reduction at a gold electrode has been studied. The differential pulse voltammetric curves exhibited well‐defined cathodic peaks. Investigations with this system suggested that the active species in the cathodic reaction is HClO. Excellent...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2010-12, Vol.22 (23), p.2765-2768
Main Authors: Saputro, Sulistyo, Takehara, Kô, Yoshimura, Kazuhisa, Matsuoka, Shiro, Narsito
Format: Article
Language:English
Subjects:
Chlorine
Differential pulse voltammetry
Drinking water
Electrodes
Electrolytic analysis
Free chlorine
Gold
Gold electrode
HClO reduction
Reduction
Reproducibility
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Summary:The electrochemical detection of free chlorine based on the reduction at a gold electrode has been studied. The differential pulse voltammetric curves exhibited well‐defined cathodic peaks. Investigations with this system suggested that the active species in the cathodic reaction is HClO. Excellent reproducibility was demonstrated at pH 5. The peak height could be used for accurate and rapid determination of free chlorine in a sample water. A linear relationship (r2=0.99) was found for the concentration range of 1–5 mg Cl dm−3 and the detection limit was estimated to be 0.04 mg Cl dm−3.
ISSN:1040-0397
1521-4109
1521-4109
DOI:10.1002/elan.201000322