OBSERVATION ON GERMICIDAL PROPERTY OF A CHLORINE DIOXIDE DISINFECTANT POWDER

Objective To evaluate the germicidal efficacy of a chlorine dioxide disinfectant powder.Methods Suspension quantitative germicidal test and physicochemical examination were used to evaluate the disinfectant property in laboratory.Results Powder A and B were compounded,and then were solved in 2 L distilled water for inactivation.The concentration of chlorine dioxide was 3 902 mg/L after inactivation for 20 min.The average killing logarithm value of Staphylococcus aureus and Escherichia coli in the suspension exposed to the disinfection solution with the concentration of chlorine dioxide was 78 mg/L for 5 min were both 5.00.And the average killing logarithm value of natural bacteria on material surface was 1.0 when scripted with 78 mg/L chlorine dioxide for 10 min.1.0 mg/L chlorine dioxide can reduce Escherichia coli added into natural water to 0 cfu /100ml in 30 min.Conclusion The chlorine dioxide disinfectant powder has good germicidal efficacy.It can be used for material surface and water disinfection.