Improved free chlorine amperometric sensor chip for drinking water applications

This paper outlines the advantages of using gold cathodes, in comparison to platinum ones, combined with a series of potential steps that keep the electrode active longer times. A working potential of 0.150 V versus Ag/AgCl (3 MKCl) allows the amperometric determination of free chlorine over the pH...

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Bibliographic Details
Published inAnalytica chimica acta Vol. 554; no. 1; pp. 98 - 104
Main Authors Campo, F. Javier Del, Ordeig, Olga, Muñoz, F. Javier
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 04.12.2005
Elsevier
Subjects
Amperometry
Analytical chemistry
Chemistry
Drinking water
Electrochemical methods
Exact sciences and technology
General, instrumentation
Hypochlorite
On-chip electrodes
Voltammetry
Amperometry
Drinking water
Voltammetry
Hypochlorite
On-chip electrodes
Gold
Cathode
Chlorine
Chemical sensor
Electrochemical detector
Platinum
Hypochlorites
Comparative study
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Summary:This paper outlines the advantages of using gold cathodes, in comparison to platinum ones, combined with a series of potential steps that keep the electrode active longer times. A working potential of 0.150 V versus Ag/AgCl (3 MKCl) allows the amperometric determination of free chlorine over the pH range most likely to be found in drinking waters. This pH window spans from pH 5 up to pH 8. The importance of pH and how it can influence the amperometric response inside and outside this narrow pH window is discussed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2005.08.035