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What are the hazards of UV lamps in biological safety cabinets to laboratory personnel?
What are the hazards of UV lamps in biological safety cabinets to laboratory personnel?The UV lamps commonly used in biological safety cabinets are mainly 254nm wavelength UV lamps, which are harmful to human eyes and skin. Therefore, in the use of ultraviolet lamps, one must pay attention to the following points.1. Minimise the time and frequency of personnel under UV irradiation, in particular, do not directly observe the radiation of UV lamps. 2. Before operation, the UV lamp must be preheated for 10-15 minutes, so that the gas in the lamp is fully excited to ensure that the UV radiation is sufficient. 3. When turning on the UV lamp, the front window of the biological safety cabinet should be closed first to avoid UV radiation out of the cabinet door. When the outer lamp is turned on, then open the front window and put the test risk items into the biological safety cabinet. 4 When closing the UV lamp, the front window should be closed first, and then close the UV lamp. Because the surface of the object irradiated by the UV lamp may retain active microorganisms if the front window is opened under the irradiation of the UV lamp, the microorganisms will be dispersed into the surrounding environment through If the front window is opened when the UV lamp is irradiated, the microorganisms will be dispersed to the surrounding environment through the airflow, increasing the risk of contamination. 5. The lamps of UV lamps also need to be replaced regularly to ensure that the output intensity and wavelength of UV light meet the requirements. In short, the correct use of UV lamps can maximize the protection of the health and safety of experimental personnel, and also ensure the accuracy of the experimental results. The life of the color lamp depends on several factors, including the quality of its manufacture, the use of the environment, the frequency of use, and so on. For a ship, the life span of the whole external light is about 5000 hours. However, in the course of use, it needs to be regularly checked and replaced to ensure its normal operation and effective sterilization. It is recommended to check and replace the UV lamp every 6 months, or according to the manufacturer's recommendations for replacement. At the same time, attention should be paid to regular cleaning of the dirt on the surface of the lamp to ensure its optimal use. |
