Kabinè sekirite byolojik
The biological safety cabinet is designed to protect operators, laboratory environment and experimental materials from possible infectious aerosols and spatters during the process of handling infectious experimental materials such as primary cultures, strains and diagnostic specimens. To meet different biological research and epidemic prevention requirements, the biological safety cabinet can be divided into three categories: Level I, Level II and Level III. It's widely used in such fields as medical care, disease prevention and control, food hygiene, bio-pharmacy, environmental monitoring, and various biology laboratories. It lays an important foundation for ensuring bio-safety and environmental safety, being a means to improving people's livelihood.
Klasifikasyon prensipal
Pou satisfè diferan rechèch byolojik ak kondisyon prevansyon epidemi, kabinè sekirite byolojik la ka klase nan twa kategori: Nivo I, Nivo II ak Nivo III.
Nivo I kabinè sekirite byolojik ka pwoteje anplwaye yo ak anviwònman an olye ke echantiyon yo. Prensip li nan koule lè a se menm ak sa yo ki nan hotte yo nan laboratwa, eksepte ke priz lè a nan kabinè byolojik la ekipe ak yon filtè HEPA. Ak tout kalite kabinè sekirite byolojik yo mete ak yon filtè HEPA nan priz lè a ak antre lè a. Kabinè sekirite byolojik Nivo I pa gen okenn fanatik tèt li epi li konte sou fanatik la nan tiyo vantilasyon ekstèn lan pou kondwi lè koule. Li te raman itilize kounye a akòz echèk li yo bay pwoteksyon pou echantiyon tès oswa pwodwi yo.
The Level II biological safety cabinet is now the most widely used type. Like the Level I biological safety cabinet, it also has airflow into the front opening, namely "inflow air", so as to prevent aerosols that may be generated during microbial operations from escaping from the opening. Yet unfiltered inflow air will be captured by its air grille before reaching working area, so that the test samples won't be polluted by the outside air. A unique feature of it is that the vertical laminar flow filtered by the HEPA filter blows down from the top of the cabinet, namely "downward flow". The downward flow continuously blows through the working area of the cabinet to protect the test samples inside from external dust or bacterial contamination.
Dapre règleman NSF49, kabinè sekirite byolojik Nivo II ka divize an 4 kalite selon vitès lè inlet, mòd echapman ak mòd sikilasyon: Tip A1, Tip A2 (ansyen yo rele Tip B3), Tip B1 ak Tip B2. Tout kalite kabinè Nivo II ka bay pwoteksyon pou travayè yo, anviwònman ak pwodwi yo.
Minimòm oswa vitès mwayèn lè mezire nan ouvèti devan kabinè tip A1 a dwe omwen 0.38m/s, pandan ke kabinè tip A2 a dwe omwen 0.5m/s. . Nan de kalite kabinèt sa yo, 70 pousan nan lè a resikle nan zòn k ap travay la atravè filtè HEPA a, epi 30 pousan yo filtre soti nan priz lè a. Ak konsepsyon de presyon negatif ki antoure zòn polye nan kabinè tip A2 anpeche flit la nan materyèl andedan.
Tout kabinèt tip B yo se kabinèt sekirite ki konekte ak sistèm lè echapman an. Se fanatik la ki konekte nan kanal echapman kabinè a ki konekte ak ekipman pou pouvwa ijans la, ki se kenbe presyon negatif menm pandan yon blakawout pou anpeche flit la nan gaz danjere (tankou gaz nan laboratwa). Minimòm oswa vitès mwayèn lè yo mezire nan ouvèti devan an ta dwe omwen 0.5m/s (100fpm). Kòm pou kabinè tip B1, 70 pousan nan gaz la filtre pa filtè HEPA nan priz lè a, epi 30 pousan yo resikle nan zòn travay la atravè filtè HEPA a nan antre lè a. Kabinè tip B2 a se yon kalite kabinè sekirite ki gen lè 100 pousan filtre epi ki pa gen okenn koule entèn sikile, ki ka bay tou de kontwòl sekirite byolojik ak chimik ansanm.
Kabinè sekirite byolojik Nivo III fèt pou laboratwa BSL-4, epi li se kabinè sekirite ki gen pi wo klas pwoteksyon sekirite nan mond lan. Li se konplètman hermetik ak lè se 100 pousan filtre soti ak pa gen okenn gaz ki enplike nan sikilasyon an. Anplwaye yo opere kabinè a lè yo mete gan yo ki konekte nan kabinè a (kouramman ke yo rekonèt kòm bwat gan). Bwat pas la ak de pòt, apwopriye pou tès byolojik ki gen gwo risk, yo adopte pou voye echantiyon tès yo nan kabinè a epi pwoteje yo kont polisyon.
According to the regulations of mandatory industry standard of safety cabinets, YY0569-2005 Biological Safety Cabinet (People's Republic of China Pharmaceuticals Industry Standard), only products that have obtained three-category medical device registration certificate issued by the State Food and Drug Administration (SFDA) can truly protect operators, laboratory environment and operated samples.
Baj popilè: kabinè sekirite byolojik, Lachin, Swèd, manifaktirè, faktori, te fè nan peyi Lachin
