目的 观察一种LED紫外线消毒柜对不同类型物体表面的消毒效果,为LED紫外线消毒技术的应用提供参考.方法 采用载体定量杀菌试验方法,设定LED紫外线消毒柜分别照射10和120 s,观察不同辐照度下LED紫外线消毒柜对不同载体上细菌的杀灭效果.结果 在LED紫外线消毒柜照射10 s 时,对含TSB菌液滴染的滤纸片和部分不锈钢片上的金黄色葡萄球菌和大肠埃希菌杀灭对数值>3.00;对含3%BSA菌液滴染的玻片、塑料片和滤纸片上的金黄色葡萄球菌和大肠埃希菌杀灭对数值均>3.00.照射120 s 时,对含TSB菌液染制的滤纸片上的枯草杆菌黑色变种芽孢杀灭对数值>3.00,对玻片和滤纸片上的白念珠菌杀灭对数值均>3.00;对含3%BSA菌液染制的玻片、塑料片和滤纸片上的枯草杆菌黑色变种芽孢杀灭对数值均>3.00,对玻片、不锈钢片、塑料片和滤纸片上的白念珠菌杀灭对数值均>3.00.结论 该LED紫外线消毒柜对滤纸片上的微生物可达到较好的消毒效果,载体类型和有机干扰物对其消毒效果影响较大;应根据待消毒物品材质、清洁程度和可能污染的病原体等选择适当的照射时间.
Preliminary study on the disinfection effect of a LED UV disinfection cabinet
Objective To observe the disinfection effects of a LED ultraviolet disinfection cabinet on different types of object surfaces,so as to provide a reference for the application of LED ultraviolet disinfection technology.Methods Using a carrier quantitative bactericidal test method,the LED ultraviolet disinfection cabinet was set to irradiate for 10 s and 120 s.The bactericidal effects on various carriers under different irradiation doses were observed.Results Irradiation for 10 s resulted in a log reduction of>3.00 for Staphylococcus aureus and Escherichia coli on filter paper and part of stainless steel plates contaminated with TSB.Similarly,the log reduction values for Staphylococcus aureus and Escherichia coli on glass slides,plastic sheets,and filter paper contaminated with 3%BSA were also>3.00.Irradiation for 120 s led to a log reduction of>3.00 for Bacillus cereus var.mycoides on filter paper contaminated with TSB,and a log reduction>3.00 for Candida albicans on glass slides and filter paper.For slides,plastic sheets,and filter paper contaminated with 3%BSA,Bacillus cereus var.mycoides also had a log reduction>3.00,and Candida albicans on glass,stainless steel,plastic sheets,and filter paper had log reductions>3.00.Conclusion LED ultraviolet light can achieve good disinfection effects on microorganisms on filter paper,with carrier types and organic contaminants significantly influencing its efficacy.Appropriate disinfection programs should be selected based on the material,cleanliness,and potential pathogens of the items to be disinfected.
LED ultravioletdisinfection cabinetbacterial carrierorganic contaminantdisinfection effect
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