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http://dx.doi.org/10.5229/JKES.2012.15.4.242

Disposable Strip-type Sensors for Detection of Free Chlorine  

Kim, Seung Ki (Department of Chemistry, Kwangwoon University)
Kang, Tae Young (Department of Chemistry, Kwangwoon University)
Cha, Geun Sig (Department of Chemistry, Kwangwoon University)
Nam, Hakhyun (Department of Chemistry, Kwangwoon University)
Shin, Jae Ho (Department of Chemistry, Kwangwoon University)
Publication Information
Journal of the Korean Electrochemical Society / v.15, no.4, 2012 , pp. 242-248 More about this Journal
Abstract
The measurement of residual chlorine as a disinfectant is very important to ensure the safety against the pathogenic microbes and to suppress injection. The portable free chlorine sensor was fabricated with a disposable strip format by a screen printing method. The strip sensors prepared with a carbon-Ag/AgCl(cathode-anode) combination exhibited less interfering responses towards combined chlorine species(especially $NHCl_2$) and oxygen than the sensors prepared with other metals(i.e., gold and platinum). Free chlorine was determined chronoamperometrically with carbon-based electrodes at an applied potential of -0.3 V(vs. Ag/AgCl). A channel was built on the strip-type electrode for easy sampling, and the resulting strip sensors were employed to determine the concentrations of residual free chlorine.
Keywords
Chlorination; Free chlorine sensor; Strip sensor; Screen printing method; Chronoamperometry;
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