How to verify the germicidal efficacy of ultraviolet germicidal lamp?

Irradiate the articles to be disinfected with ultraviolet germicidal lamp or place the ultraviolet germicidal lamp in the environment to be disinfected. Ultraviolet rays can kill bacteria and viruses intensively in a short time, which belongs to pure physical disinfection method and has no secondary pollution. Then, compare conventional chemical disinfection with heating disinfection.

Ministry of Health (version 20 19) is a common standard for evaluating the surface disinfection effect of ultraviolet germicidal lamps? 1. This standard tests the irradiation intensity and sterilization effect of ultraviolet lamps (including double-tube combined lamps) to verify whether their sterilization performance meets the qualified standards.

For ordinary or low ozone straight tube ultraviolet lamp (30W), the irradiance value of the new tube should be ≥90μW/cm? . For the lamp in use, the irradiance value should be ≥70μW/cm? . ? The determination method and qualification standard of multi-lamp combination lamp are the same as that of single lamp. The qualified standard of detection distance and irradiance value of special-shaped (non-straight tube), high-intensity or non-30W power lamps depends on the product use and use method.

In principle, it should not be lower than the irradiance value indicated in the product instruction, and the sterilization test should be carried out according to its recommended dose [i.e. the irradiance value multiplied by the irradiation time (s)]. Those who can meet the required effect in the laboratory test are judged as qualified. At the same time, 10 lamps were randomly selected for each identification of irradiance detection, and each lamp was repeated for 3 times. Only when all the data are up to standard can the irradiation intensity be judged to be qualified.