The 253.7 nm (254 nm) light emitted by the ultraviolet Germicidal lamp coincides with the absorption spectrum of nucleic acid in microbial cells, thus destroying the molecular structure of DNA (DNA) or RNA (ribonucleic acid) in the cells of microbial organism, causing growth cell death and/or regenerative cell death, achieving the effect of sterilization and disinfection.
The effectiveness of ultraviolet sterilization is influenced by the dosage of ultraviolet radiation, rather than simply measured by the sterilization rate. Sterilization dose refers to the total amount of ultraviolet radiation received by bacteria or microorganisms, which is calculated by the product of ultraviolet Radiant intensity and exposure time. When using ultraviolet ray for sterilization, it is necessary to ensure the Radiant intensity and radiation time of the Germicidal lamp to ensure the sterilization dose. Although bactericidal dosage can be used to measure the effectiveness of killing microorganisms, it cannot directly reflect the bactericidal rate.