Abstract:
Objective To compare the disinfection efficacy of chlorine-based disinfectants, compound quaternary ammonium salt disinfectants and ultraviolet disinfection lamps on the infectious outer packaging materials made of cardboard, aluminum alloy and polypropylene plastics.
Methods With Staphylococcus aureus and Escherichia coli as the indicator bacteria, chlorine-based disinfectants, compound quaternary ammonium salt disinfectants and ultraviolet disinfection lamps were used to simulate the on-site disinfection of outer packaging materials made of cardboard, aluminum alloy and polypropylene plastics. Samples of the indicator bacteria were collected before and after disinfection, and the efficacy of disinfection was evaluated according to the Standard for Evaluating the Efficacy of Disinfection on Site (WS/T 797-2022).
Results The killing logarithmic values of Staphylococcus aureus and Escherichia coli on outer packaging materials made of cardboard, aluminum alloy and polypropylene plastic were >3.9 disinfected by chlorine-based disinfectants, and >4.5 by compound quaternary ammonium salt disinfectants and >4.3 by ultraviolet disinfection lamps. The results of variance analysis showed that there were no significant differences in the killing logarithmic values of bacteria between outer packaging materials made of cardboard, aluminum alloy, and polypropylene plastics after disinfection with the same method (P>0.05).
Conclusion Chlorine-based disinfectants, compound quaternary ammonium salt disinfectants and ultraviolet disinfection lamps have good disinfection efficacy on outer packaging materials made of cardboard, aluminum alloy, and polypropylene plastics.