Biosafety cabinets, ventilation cabinets, super clean bench three distinguish
A clear understanding of the distinction between biosafety cabinets and fume hood / super clean bench is required. exacta safety storage cabinetsFume hood and super clean bench are not biological safety cabinet, and can not be used in the experiment or production process involving microbial material. The biological safety cabinet (Biological safety cabinets, BSCs) is the primary operation for culture, strains and diagnostic specimens with infection of experimental materials, used to protect personnel, environment and laboratory experiment, so as to avoid the infection of aerosols and spills in the operation process of possible exposure and design the. WHO published "laboratory biosafety manual" clearly stated: "the biological safety cabinet can effectively reduce the aerosol exposure in the laboratory infection and culture * pollution, biological safety cabinet can also protect the environment". Of course, the premise of the safety cabinet's effective work is to buy qualified safety cabinets and correct safe cabinets. Fume hoods (cupboards) are designed for the removal of corrosive chemical gases and toxic fumes during chemical experiments. Because the HEPA filter is not equipped, the fume hood can not effectively remove the microbial media. Placed in the fume hood, microbiological samples are disseminated outside the cabinet to contaminate the laboratory environment. Clean bench (super clean bench) is to protect the product or product testing and design, to prevent the test products or products by working outside the region of dust or bacteria pollution through the vertical or horizontal laminar flow air over the working area. As soon as microbiological samples are placed in the work area, laminar air will create danger of blowing the air with microbial media to the front desk staff. Enclosed: basic certification knowledge of biosafety cabinets and super clean units Since most users do not know much about the performance, testing and testing of the safe and ultra clean units, they have caused blind spots for these instruments. Often, however, these blind spots can cause fatal injuries, such as recent laboratory virus leaks in Singapore, Taiwan and Beijing. Whether it is super clear or safe, it is inadequate to rely on wind speed to measure safety. The standard inspection and authentication rules ensure the reliability of the inspection and ensure the safety performance of the safety cabinet. At present, the international standard of ultra clean Taiwan is: Air cleanliness level meets ISO14644.1; Australian standard AS 1807; IEST-RP-CC002.2 standard. Biosafety cabinet standard: American ANSI/NSF49 (level two safety cabinet); European standard EN12469:2000 (one, two, three safety cabinets); The ultra clean platform can only protect the sample, and can not protect the operator.exacta safety storage cabinets Its qualification includes the following steps: 1) use a rotating impeller anemometer and a heat anemometer to measure the flow rate of the super clear table. Average value of safety air flow: 0.4-0.5m/s, maximum deviation 20%. 2) measure the integrity of ultra clean filter: use natural moisture detector. 3) measure the intensity and noise of the ultra clean station. Biosafety cabinets are closely related to scientific research, including two biosafety cabinets and three biosafety cabinets. Among them, two biological safety cabinets can be divided into several categories, but the laboratory often uses 30% gas efflux, 70% gas cycle type A/B3 and 100% gas efflux type B2. Biosafety cabinets not only protect samples, but also protect operators, so they are called "safe" cabinets. The detection procedure is as follows: 1) measure incoming gas flow (forward air flow): use a heat anemometer or DIM air hood. 2) measuring downward gas flow: there are two ways, depending on the NSF49 and EN12469 standards. But all the heat meters are used to determine the down flow rate. 3) ULPA filter inspection: wet agent photometer, wet generator, pressure measuring instrument, PAO measuring instrument. 4) and noise, light intensity, vibration intensity measurement. 5) finally use the smoke generator to carry on the airflow image test.