二氧化氯消毒剂性能的实验观察

为了解洁宝灵牌二氧化氯消毒剂杀菌效果和毒性,进行了悬液定量杀菌试验和动物毒性试验。结果,含二氧化氯 12. 5mg/L的该液对大肠杆菌作用 10min,对金黄色葡萄球菌作用 15min,杀灭对数值均≥5. 00;含二氧化氯 50mg/L的该液对枯草杆菌黑色变种芽孢作用 20min,杀灭对数值≥5. 00。实验室和模拟现场水消毒试验及天然水(河水)消毒试验中,最低有效剂量均为 0. 15mg/L二氧化氯作用 20min。pH值、水温对其杀菌效果无明显影响;有机物对其杀菌效果有影响。毒性试验表明,该消毒剂属实际无毒,对皮肤有轻度刺激性,小鼠骨髓嗜多染红细胞微核试验阴性。

EXPERIMENTAL OBSERVATION ON PROPERTIES OF CHLORINE DIOXIDE DISINFECTANT

In order to know the germicidal efficacy and toxicity of Jie-Bao-Ling-Brand chlorine dioxide disinfectant, suspension quantitative germicidal test and animal toxicity test were carried out. Results: The killing logarithm of Escherichia coli and Staphlococcus aureus exposed to the disinfectant solution containing chlorine dioxide 12.5 mg/L for 10 min and 15 min was ≥5.00. The killing logarithm of spores of Bacillus subtilis var. niger exposed to the solution containing chlorine dioxide 50 mg/L for 20 min was ≥5.00. Laboratory and simulated field test for water disinfection and natural water (river water) disinfection test showed that the minimal effective dose was chlorine dioxide 0.15 mg/L with a contact time of 20 min. pH and water temperature had no obvious influence on its germicidal efficacy, while organic substance had influence on its germicidal efficacy. Toxicity test indicated that this disinfectant belonged to practically non-toxic class. It was slightly irritative to skin and mouse bone marrow polychromatic erythrocyte micronucleus test was negative.