DA含氯消毒剂性能的研究

STUDY ON PROPERTIES OF DA CHLORINE-CONTAINING DISINFECTANT

为了解DA含氯消毒剂的性能,对其进行了理化指标检验、载体定量杀菌效果试验及现场消毒试验。结果,以含有效氯1000 mg/L该消毒剂溶液对枯草杆菌黑色变种芽孢作用20min,含有效氯250mg/L该剂对大肠杆菌和金黄色葡萄球菌作用1min,对白色念珠菌作用10min,各次杀灭率均达100％。含有效氯1000mg/L该剂对HBsAg作用30min,可有效破坏HBsAg的抗原性。用含有效氯300mg/L的溶液擦拭物体表面并作用10min,可使物体表面自然菌减少90％以上。能量试验证明其最低合格浓度为1000mg/L有效氯,经1000 mg/L有效氯DA消毒剂浸泡72h,对不锈钢片无腐蚀,对铝片、铜片有轻度腐蚀,对碳钢片重度腐蚀。结果表明,DA消毒剂杀菌谱广,杀菌效果较好,但具有腐蚀性。

In order to know the properties of DA chlorine-containing disinfectant, examination of physicochemical indices, carrier quantitative germicidal efficacy test and field disinfection trial were carried out. The results showed that the killing rates of Bacillus subtilis var. niger spores exposed to the disinfectant solution containing available chlorine 1 000 mg / L for 20 min, Escherichia coli and Staphylococcus aureus exposed to the disinfectant containing available chlorine 250 mg / L for 1 min and Candida albicans exposed for 10 min were 100%. The disinfectant containing available chlorine 1 000 mg/ L with a 30 min contact time could destroy effectively the antigenicity of HBsAg. Wiping the surfaces of objects with the solution containing available chlorine 300 mg / L with a 10 min contact time could reduce the natural bacteria on the surfaces by over 90%. Capacity test demonstrated that the minimum eligible concentration was available chlorine 1 000 mg / L. Immersion in DA disinfectant containing available chlorine 1 000 mg / L for 72 h did not corrode stainless steel coupon, slightly corroded aluminum coupon and copper coupon and severely corroded carbon steel coupon. The results indicate that DA disinfectant has good broad-spectrum germicidal efficacy, but has corrosiveness.