著者

土屋 桂 堀田 国元

出版者

拓殖大学

雑誌

拓殖大学理工学研究報告 (ISSN:09198253)

巻号頁・発行日

vol.9, no.2, pp.21-30, 2004-10-20

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The chemical properties of the acidic electrolyzed water were reviewed in their possible role as a bactericidal factor. In connection with this, chemical substance structure, chemical reaction, oxidation-reduction potential (ORP), Nernst's equation, pH, Pourbaix diagram and available chlorine concentration (ACC) necessary for understanding the chemical properties were outlined. Based on the results of the bactericidal tests against Bacillus subtilis, the following concluding remarks on the bactericidal activity of the acidic electrolyzed water were obtained. 1) Bactericidal activity is mainly dependent on available chlorine in the form of HClO and Cl_2. 2) At ordinery pH, H^+ has no direct contribution to the bactericidal activity at ordinary pH except for its effect on the ratio of HClO and ClO^-. 3) ORP has no direct role to the bactericidal activity. 4) Radicals are not contributive as the original basis for the bactericidal effect.