잔류염소 측정용 전기화학센서의 유효성Effectiveness of the Electrochemical Sensor for the Free Chlorine Measurement
- Other Titles
- Effectiveness of the Electrochemical Sensor for the Free Chlorine Measurement
- Authors
- 김홍원; 정남용
- Issue Date
- Oct-2012
- Publisher
- 한국생산제조학회
- Keywords
- Free residual chlorine; Electroanalytical method; Tree electrode system; Amperometry; Gold disk electrode; 유리잔류염소; 전기분석화학 방법; 3 전극계; 전류법; 금 전극
- Citation
- 한국생산제조학회지, v.21, no.5, pp.720 - 725
- Journal Title
- 한국생산제조학회지
- Volume
- 21
- Number
- 5
- Start Page
- 720
- End Page
- 725
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/13124
- DOI
- 10.7735/ksmte.2012.21.5.720
- ISSN
- 2508-5093
- Abstract
- Sodium hypochlorite is used worldwide as a water disinfectant and in bleaching agent. Sodium hypochlorite applied to water initially undergoes hydrolysis to form free chlorine consisting of hypochlorous acid(HOCl) and hypochlorite ion($OCl-). For free chlorine determination, an electrochemical method is simple due to the electroactivity of free chlorine; it measures current and is free of most reagents. Amperometric free chlorine sensor has been developed with gold (Au)-based electrode. The 3-electrode free chlorine sensor whose working and counter electrodes were Pt exhibited excellent response to HClO at +400mV vs. Ag/AgCl/sat. KCl. In addition, the use of a pH error correction algorithm provided a reliable measurement of residual free chlorine in water sample without any pretreatment in the normal pH range(pH 6~8) of municipal water supply. The free chlorine sensor installed in on-line monitoring system could be used to continually monitor the level of residual free chlorine in real samples.
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