二氧化氯消毒液性能的试验观察

二氧化氯消毒液为一元制剂,为了解其性能,采用悬液定量杀菌试验、能量试验、现场试验以及毒理学评价进行了试验观察。结果,以含二氧化氯 100mg/L该消毒液作用 5min,对悬液内金黄色葡萄球菌、大肠杆菌杀灭对数值均>5. 0;以 500mg/L二氧化氯消毒液作用 30min,对枯草杆菌黑色变种芽孢的平均杀灭对数值 >5. 0。对大肠杆菌能量试验的最低有效浓度为 200mg/L二氧化氯。用 500mg/L二氧化氯水溶液作用 5min,对染于瓷碗、竹筷和桌面上的大肠杆菌杀灭对数值>3. 0,对黄瓜表面自然菌的杀灭对数均值为 1. 40。含二氧化氯 1mg/L的消毒液使水样中大肠菌群数下降至 0cfu/100ml,水温、有机物和pH值均对饮用水中二氧化氯杀菌效果有一定影响。该消毒液对小鼠急性经口LD50 >5000mg/kg,属于无毒级;对小鼠骨髓嗜多染红细胞微核试验结果为阴性。结论该消毒液杀菌效果可靠,作用快速,毒性低,对饮用水和果蔬消毒具有应用价值。

EXPERIMENTAL OBSERVATION ON THE PROPERTIES OF CHLORINE DIOXIDE DISINFECTION SOLUTION

The Chlorine Dioxide Disinfection Solution is a single-ingredient preparation. In order to know its properties, suspension quantitative germicidal test, capacity test, field trial and toxicological evaluation were used to carry out experimental observation. Results: The killing logarithm of Staphylococcus aureus and Escherichia coli in suspension exposed to the disinfection solution containing chlorine dioxide 100 mg/L for 5 min was >5.0 and that for Bacillus subtilis var. niger spores exposed to the disinfection solution containing chlorine dioxide 500 mg/L for 30 min was also >5.0. The minimal concentration in capacity test for E. coli was chlorine dioxide 200 mg/L. The killing logarithm of E. coli on the porcelain bowl, bamboo chopsticks and table surface exposed to the water solution containing chlorine dioxide 500 mg/L for 5 min was >3.0 and that of the natural bacteria on surface of cucumber was 1.40. The disinfection solution containing chlorine dioxide 1 mg/L caused reduction of coli-group count in water sample to 0 cfu/100ml. The water temperature, organic substances and pH value had certain influence on germicidal efficacy of chlorine dioxide in drinking water. The mouse acute LD 50 of the disinfection solution was >5000 mg/kg, so it belongs to non-toxic class. The result of mouse bone marrow polychromatic erythrocyte micronucleus test was negative. Conclusion: The disinfection solution has rapid, reliable germicidal efficacy, low toxicity and applied value for disinfection of drinking water, fruits and vegetables.