一元制剂固体二氧化氯消毒剂的杀菌性能观察

OBSERVATION ON GERMICIDAL PROPERTY OF MONOPHYLETIC PREPARATION OF SOLID CHLORINE DIOXIDE DISINFECTANT

目的了解一元制剂固体二氧化氯消毒剂的杀菌性能。方法采用悬液定量杀菌试验和现场消毒试验方法进行了实验研究。结果含二氧化氯50 mg/L该消毒剂溶液对悬液内金黄色葡萄球菌和大肠杆菌作用2.5min,杀灭对数值均大于5.0。含二氧化氯300 mg/L的该消毒剂对枯草杆菌黑色变种芽孢作用20 min,杀灭对数值均大于5.00。用300 mg/L二氧化氯消毒液按10 ml/m3量在20 m3的气雾室内进行气溶胶喷雾消毒作用60 min,对空气中白色葡萄球菌的杀灭率各次均大于99.90%;用同样剂量对60 m3办公室空气中自然菌的消亡率大于90.0%。用含50 mg/L二氧化氯消毒液擦拭桌面或浸泡织物5 min,对自然菌的消亡率分别为96.89%和97.41%。结论该二氧化氯消毒剂对细菌繁殖体和细菌芽孢都有较好的杀灭效果。

Objective To know the germicidal property of monophyletic preparation of solid chlorine dioxide disinfectant. Methods Suspension quantitative germicidal test and field disinfection trial method were used to carry out experimental study. Results The killing logarithm values of Staphylococcus aureus and Escherichia coli in suspension exposed to the disinfectant solution containing chlorine dioxide 50 mg/L for 2.5 min were 〉5.0 and that of spores ofBaciUus subtilis var. niger exposed to the disinfectant solution containing chlorine dioxide 300 mg/L for 20 min was 〉 5.0. Aerosol spraying disinfection of 20 m^3 aerosol chamber for 60 min with 300 mg/L chlorine dioxide disinfection solution at a dosage of 10 ml/m^3 killed 〉99.90% of Staphylococcus albus in air. Disinfection of 60 m^3 office with the same dosage caused 〉90.0% withering rate of natural bacteria in air. Wiping the table surface with the disinfection solution containing chlorine dioxide 50 mg/L or immersion of texile in the disinfection solution for 5 rain caused 96.89% and 97.41% withering rates of the natural bacteria respectively. Conclusion The chlorine dioxide disinfectant has good efficacy in killing both vegetative forms of bacteria and bacterial spores.