EXPERIMENTAL STUDY ON GERMICIDAL EFFICACY OF COMPOUND HYDROGEN PEROXIDE DISINFECTANT

In order to observe the germicidal efficacy and air-disinfection efficacy of compound hydrogen peroxide disinfectant,suspension quantitative method and air disinfection test were used to carry out experimental studies.Results: The compound disinfectant containing hydrogen peroxide 10.91 g/L and 7.272 g/L with a 45 min contact time killed 100% of Staphylococcus aureus and Escherichia coli respectively.The compound disinfectant containing hydrogen peroxide 36.36 g/L with a 30 min contact time killed over 99.9% of Candida albicans.The disinfectant solution containing 21.82 g/L hydrogen peroxide alone with a 45 min contact time killed 99.99% of Escherichia coli and Staphylococcus aureus.Aerosol spraying disinfection with the compound disinfectant containing hydrogen peroxide 9.03 g/L at a dosage of 10 mg/m~3 with a 15 min contact time killed 100% of Staphylococcus albus sprayed artificially in aerosol chamber.In the field spraying disinfection trial,the same dosage with a 30 min contact time caused over 90% eliminating rate of natural bacteria in indoor air.The results showed that the compound hydrogen peroxide disinfectant had good efficacy in killing microorganisms in suspension and air and the germicidal efficacy of the compound disinfectant was better than that of hydrogen peroxide alone.