Bactericidal Effect of Acidic Electrolyzed Water-Comparison of Chemical Acidic Sodium Hydrochloride (NaOCl) Solution

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  • IWASAWA Atsuo
    Department of Clinical Pathology, Showa University Fujigaoka Hospital
  • NAKAMURA Yoshiko
    Department of Clinical Pathology, Showa University Fujigaoka Hospital

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Other Title
  • 酸性電解水と擬似的酸性水との殺菌効果の比較検討
  • サンセイ デンカイスイ ト ギジテキ サンセイスイ ト ノ サッキン コウカ

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Description

Acidic electrolyzed water is made recently by various kinds of machines and is widely utilized. In this study, we intended to clarify the relationship between the concentration of chloride and pH in the bactericidal effects with acidic electrolyzed water. The effects of weak or strong acidic electrolyzed water were compared with a pseudo-acidic water of pH adjusted by diluted hydrochloric acid and sodium hydroxide, on Staphylococcus aureus, Staphylococcus epidermidis and Pseudomononas aeruginosa. At pH 5.0-6.0, 3 bacterial strains were killed soon after being exposed to the acidic water containing chloride 50 mg/liter, and the amount of chloride did not change after allowing to stand open for 6 hours. At pH 2.67-2.80, the bactericidal effects was observed at the concentration of chloride 5 mg/liter, and 80% of chloride remained after allowing to stand for 6 hours. These results indicated that newly made strong acidic water is more effective under a smaller amount of chloride at pH 2.7, and that weak acidic electrolyzed water should be used, if stable bactericidal effect is expected in cleaning the surroundings.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 70 (9), 915-922, 1996

    The Japanese Association for Infectious Diseases

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