Objective

To study the effectiveness and feasibility of cryogenic disinfectants in different cold scenarios and analyze the key points of on-site cryogenic disinfection.

Methods

Qingdao and Suifenhe were selected as application sites for the manual or mechanical spraying of cryogenic disinfectants. The same amount of disinfectant (3,000 mg/L) was applied on cold chain food packaging, cold chain containers, transport vehicles, alpine environments, and article surfaces. The killing log value of the cryogenic disinfectant against the indicator microorganisms (Staphylococcus aureus and Escherichia coli) was used to evaluate the on-site disinfection effect.

Results

When using 3,000 mg/L with an action time of 10 min on the ground in alpine regions, the surface of frozen items, cold-chain containers, and cold chain food packaging in supermarkets, all external surfaces were successfully disinfected, with a pass rate of 100%. The disinfection pass rates for cold chain food packaging and cold chain transport vehicles of centralized supervised warehouses and food processing enterprises were 12.5% (15/120), 81.67% (49/60), and 93.33% (14/15), respectively; yet, the surfaces were not fully sprayed.

Conclusion

Cryogenic disinfectants are effective in disinfecting alpine environments and the outer packaging of frozen items. The application of cryogenic disinfectants should be regulated to ensure that they cover all surfaces of the disinfected object, thus ensuring effective cryogenic disinfection.

中文翻译：

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一种用于高山环境和冷冻物品外包装的低温消毒剂的现场评估

客观的

研究低温消毒剂在不同寒冷场景下的有效性和可行性，分析现场低温消毒的要点。

方法

青岛和绥芬河被选为人工或机械喷洒低温消毒剂的应用地点。对冷链食品包装、冷链集装箱、运输车辆、高寒环境、物品表面等进行了等量消毒（3000mg/L）。以低温消毒剂对指示微生物（金黄色葡萄球菌和大肠杆菌）的杀灭log值评价现场消毒效果。

结果

3000mg/L，作用时间10min，对高寒地区地面、冷冻物品表面、冷链集装箱、超市冷链食品包装等外表面全部消毒成功，合格率的 100%。集中监管仓库、食品加工企业冷链食品包装、冷链运输车辆消毒合格率分别为12.5%（15/120）、81.67%（49/60）、93.33%（14/15）；然而，表面没有完全喷涂。

结论

低温消毒剂对高山环境和冷冻物品的外包装消毒有效。应规范低温消毒剂的使用，确保其覆盖消毒对象的所有表面，确保低温消毒有效。