Laboratory standard testing and certification rules
Release time:2021-11-02 09:55:33
Laboratory standard testing and certification rules
Since most users do not know much about the performance, testing and testing of safety cabinets and ultra-clean benches in biosafety laboratories, they have created blind spots in understanding these instruments. However, sometimes these blind spots can cause fatal injuries. It is not sufficient to measure whether the ultra-clean table or the safety cabinet is safe according to the wind speed. Standard testing and certification rules ensure the credibility of the testing and the safety performance of the safety cabinet.
The current international standards for ultra-clean platforms are:
The air cleanliness grade conforms to ISO14644.1;
Australian Standard AS 1807;
IEST-RP-CC002.2 standard.
Biological safety cabinet standard:
American ANSI / NSF49 (second-level safety cabinet);
European standard EN12469: 2000 (Class I, II, and III safety cabinets);
The ultra-clean platform can only protect the samples, but not the operators. Its certification includes the following steps:
1) Measure the airflow rate of the ultra-clean bench with a rotating impeller anemometer and heat anemometer. The average value of safe airflow: 0.4-0.5m / s, the maximum deviation is 20%.
2) Measure the integrity of the ultra-clean table filter: use natural aerosol detector.
3) Measure the light intensity and noise inside the ultra-clean platform.
Biological safety cabinets currently closely related to scientific research are the second-level biological safety cabinet and the third-level biological safety cabinet. Among them, the secondary biological safety cabinets can be divided into several categories, but the laboratory often uses the A / B3 type with 30% gas discharge, 70% gas circulation and the B2 type with 100% gas discharge. Biological safety cabinets can protect not only samples but also operators, so they are called "safe" cabinets. The detection steps are as follows:
1) Measure the inflow air flow (front air intake): use a thermal anemometer or DIM airflow hood.
2) Measure downward air flow: There are two ways according to NSF49 and EN12469 standards. But all use the thermal anemometer to measure the downward airflow rate.
3) ULPA filter detection: wet agent photometer, wet agent generator, pressure measuring instrument, PAO measuring instrument.
4) There are also noise, light intensity, vibration intensity measurement.
5) Finally, use the smoke generator to test the airflow image.
Laboratory science is inseparable from advanced scientific instruments and equipped with modern laboratory equipment and sophisticated laboratory purification engineering design. In today’s era of rapid development of science and technology as the first productive force, laboratory equipment is an important foundation and supporting condition for scientific and technological innovation, and has become one of the decisive factors for scientific development and breakthroughs. Laboratory purification engineering design and social service level are important indicators of the level of technology and economic development.
