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Development of an all-solid-state residual chlorine sensor for tap water quality monitoring

2017; Elsevier BV; Volume: 248; Linguagem: Inglês

10.1016/j.snb.2017.03.089

1873-3077

Naoki Kato, Natsumi Hirano, Shinji Okazaki, Satoru Matsushita, Tomoo Gomei,

Water Quality Monitoring and Analysis

A simple electrochemical sensor for the in-line monitoring of residual chlorine in tap water has been proposed. In this study, potentiometric sensors using either Pt, Al or stainless steel working electrodes were fabricated. Both Pt and stainless steel electrodes exhibited high performance. As an example, a 200 mV response was obtained from SUS304 stainless steel electrode exposed to 1 mg/L residual chlorine concentration within about 4 min. The effects of pH and dissolved oxygen concentration as environmental factors were evaluated, and Pt and SUS316 electrodes showed the same variation with changes in these parameters. The data suggest that the appropriate pairing of electrode materials could allow the fabrication of all-solid-state sensor devices with the advantages of compactness, low power consumption, low cost and robustness.