Summary of Certification Content

Detection method:

Collection and screening of household dust mites: Household dust mites were collected from the natural environment. Based on the mites' photophobic behavior, they were moved into mites using a fluorescent lamp short exposure method, and separated and collected into mites using a brush under an optical microscope.

In the 2 irradiation mite killing experiment, 25 adult mites were placed in a glass vessel with a diameter of 5.0cm and a height of 2.0cm. The handheld ultraviolet sterilizer was placed directly above the glass vessel (2.0cm away from the mites) for irradiation. The irradiation method is carried out according to the product manual, and the irradiation dose and grouping are determined based on the results of the pre experiment. Three irradiation dose groups are set: 4.83 minutes, 7.0 minutes, and 9.0 minutes of irradiation at the application distance of the handheld ultraviolet sterilizer. Immediately after irradiation, observe the activity of dust mites under an optical microscope, and observe their survival status at 1 hour, 12 hours, and 24 hours after irradiation. Based on the final inactivity as the determination of inactivation, calculate the killing rate [killing rate=(number of test dust mites - number of surviving dust mites)/number of test dust mites], and repeat 4 times for each test point.

When conducting mite killing experiments, a control group was also set up: except for the absence of ultraviolet radiation, other environmental conditions were the same, and the survival of small mites was observed at different times.