Biosafety cabinet is a kind of safety equipment widely used in scientific research, teaching, clinical examination and production in microbiology, biomedicine, gene recombination, animal experiment, biological products and other fields. It is also the most basic safety protection equipment in the first-class protective barrier of laboratory biosafety.
Function, use, structure, exhaust system and/or gas supply system (high efficiency particulate air filter) of the biosafety cabinet, as well as basic principles, installation principles and requirements, laboratory operation procedures, daily maintenance requirements, etc. These contents are the knowledge that must be mastered when actually using and operating the biosafety cabinet.
Most laboratory workers lack understanding of the performance, selection, operation and maintenance of biosafety cabinets, and often confuse biosafety cabinets with clean benches. In fact, there is an essential difference between the two. Biosafety cabinet is a negative pressure purification workbench. The correct operation of the biosafety cabinet can completely protect the staff and the tested samples and prevent cross-contamination. However, the clean workbench only protects the operating object, not the staff and the laboratory environment. Therefore, in the scientific research, teaching, clinical examination and production of microbiology and biomedicine, biosafety cabinets should be used instead of clean work tables.
Various terms and definitions, classification, design, basic requirements of structure and performance, test methods, inspection rules, signs, labels and descriptions, packaging, transportation and storage requirements, inspection and verification methods, selection and calibration of testing instruments, ex-factory inspection requirements of products, on-site inspection requirements, etc. It is used for the design, production, inspection and verification of biosafety cabinets.
The clean workbench () is designed to protect experimental materials. Air is sucked into the pre-filter by the fan, filtered by the high-efficiency filter through the static pressure box, and the filtered air is sent out in the state of vertical or horizontal airflow, so that the cleanliness of the working area can reach 100 level and the requirements of environmental cleanliness in production can be guaranteed.
The clean workbench can only protect the samples, but not the operators.
In terms of cleanliness, biosafety cabinets are also more advanced than clean worktables.