The Use Of Ultraviolet Light-What Items Can Be Sterilized With Ultraviolet Light?

As a UVC LED Handheld Sterilizer Supplier, share it with you. The light of the UV lamp can kill 99.99% of the viruses on the surface made of glass, metal, wood, plastic and other materials added with UV inhibitors. Most high-quality plastics have added inhibitors to protect items used outdoors from sunlight. However, some cheap plastics do not add any UV inhibitors. Components made of these low-quality materials may change color and/or become brittle after continuous exposure to ultraviolet light.

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UV disinfection

Ultraviolet light is an effective biocide, which can fight various types of microorganisms. It can not only inactivate viruses and kill bacteria, but also destroy fungal spores. However, it is important to understand how to use radiation for effective disinfection.

There are many commercially available UV-based sterilizers. They are widely used in medical facilities, treatment rooms, beauty salons and other similar places. The most popular UV lamps are designed for room disinfection; they are mounted on a mobile stand and can be moved to the desired location. UV-based sterilizers can also be constructed as relatively large boxes or chambers similar to microwave ovens. They can be used to sterilize items such as scissors, tweezers and other items that can be placed in the chamber.

The amount of radiation reaching the surface is expressed in Joules per square meter (J/m 2). As we remembered in physics class, 1 joule is the work done by 1 W of power in 1 second, so 1 J = 1 W × 1 s. It can be seen from the formula that if the radiation power is constant, the energy reaching the surface of the object depends on the irradiation time. The longer the time, the greater the proportion of virus inactivation.

Use ultraviolet light with a wavelength of 270 to 280 nm for disinfection and sterilization. However, the entire ultraviolet spectrum covers wavelengths from 100 to 400 nm. The resistance of microorganisms to ultraviolet radiation varies. Bacteria die fastest under ultraviolet light, while their spores, viruses and fungal spores are destroyed more slowly. Most known bacteria, viruses and spores are effectively destroyed after being exposed to 8 mJ/cm2 of ultraviolet light. Fungal spores are the most resistant to UV radiation, but the good news is that pathogenic fungi are not as resistant to UV radiation as bacterial spores.

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