2025 SMSI Bannerklein

P2EC.12 - Potential Response of Passive Metal Electrodes to Free Chlorine in tap water

Event
17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
Chapter
P-2 - Electrochemical Sensors
Author(s)
K. Okamura, N. Hirano, N. Yamasaku, S. Okazaki - Graduate School of Engineering, Yokohama National University, Yokohama City (Japan), Y. Tanaka, I. Hori, T. Gomei - R&D, Aichi Tokei Denki. Co., Ltd., Nagoya City (Japan)
Pages
723 - 724
DOI
10.5162/IMCS2018/P2EC.12
ISBN
978-3-9816876-9-9
Price
free

Abstract

For realizing an all-solid-state free chlorine sensor composed of two dissimilar electrodes,dependences of open-circuit potentials on free chlorine concentration in simulated tap water condition were evaluated for several metal electrodes. In this study, stainless steel, tungsten, tantalum, and titanium which are well known metals to form stable passive film on its surface were tested. Although each metal electrode showed different sensitivity, it was found that the electrodes can detect free chlorine in practical concentration range below 1 mg/L. Among them, stainless steel electrode exhibited relatively high sensitivity. This suggests that the appropriate combination of dissimilar metal electrodes enable us to measure free chlorine with high sensitivity and low cost.

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