论文部分内容阅读
目的:考察戊二醛溶液持续使用天数及次数与稳定性的关系。方法:用试管稀释法确定中性与碱性戊二醛的最低杀菌浓度,并采用羟胺缩合紫外分光光度法监测两者在持续使用过程中及使用次数不同情况下的含量变化。结果:碱性戊二醛对大肠杆菌、金黄色葡萄球菌的MBC大于中性戊二醛,对枯草芽孢杆菌则反之;两者含量均随放置时间不断下降,下降幅度碱性戊二醛大于中性戊二醛,而使用次数对其影响不大。结论:中性戊二醛对大肠杆菌、金黄色葡萄球菌杀菌力强且稳定性高,碱性戊二醛对枯草芽孢杆菌杀菌力较强但稳定性低。
Objective: To investigate the relationship between the number of days and the number of stability of glutaraldehyde solution. Methods: The minimum bactericidal concentration of neutral and basic glutaraldehyde was determined by test tube dilution method, and the change of the content of both neutral and basic glutaraldehyde was monitored by hydroxylamine condensation UV spectrophotometry. Results: The MBC of alkaline glutaraldehyde to Escherichia coli and Staphylococcus aureus was higher than that of neutral glutaraldehyde, but to Bacillus subtilis, the content of both were decreased with time, the decreasing extent of alkaline glutaraldehyde was higher than that of medium Glutaraldehyde, while the use of the number of its little effect. CONCLUSION: Neutral glutaraldehyde has strong bactericidal and stability against Escherichia coli and Staphylococcus aureus, while alkaline glutaraldehyde has strong bactericidal activity against Bacillus subtilis but low stability.