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UV application

Surface sterilization

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(1)irradiation mode: it is better to use portable ultraviolet disinfector to move irradiation at close range, or adopt UV lamp suspension irradiation.Can put ultraviolet ray inside disinfection box irradiation to small article

(2)Irradiation dose and time: different types of microorganisms have different sensitivity to ultraviolet radiation, and irradiation dose must be used to achieve the irradiation dose required to kill the target microorganisms when disinfecting with ultraviolet radiation.

When killing the general bacterial propagators, the irradiation dose should reach 10000 uW.s /CM2;The killing of bacterial germ cells should reach 100,000 uW.s /CM2;The resistance of virus to ultraviolet rays is between bacterial propagator and germ cell.Fungal spores are more resistant to infection than bacterial spores and are sometimes irradiated to 600000 uW.s /CM2.When the target microorganism of disinfection is unknown, the radiation dose should not be less than 100,000 uW.s /CM2.

The irradiation dose is the product of the irradiation intensity and irradiation time of the ultraviolet lamp irradiated on the surface of the object.Therefore, according to the irradiation intensity of ultraviolet light source, the irradiation time can be calculated.For example, a UV surface disinfector with an irradiation intensity of 70 uW/CM2 is used to illuminate the surface of an article at close range;The radiation dose selected was 100,000 uw. s/CM2;The irradiation time is:

100000 uW.s/CM2 ÷70 uW/CM2=24min