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不(bu)同種類空氣(qi)微(wei)生(sheng)物(wu)(wu)(wu)采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)器性能差異,在(zai)一般(ban)情況下,采(cai)(cai)集小粒子都有很高(gao)的(de)效(xiao)率。室(shi)內空氣(qi)微(wei)生(sheng)物(wu)(wu)(wu)污染的(de)程度(du)(du)是衡(heng)量室(shi)內空氣(qi)質量好壞的(de)重要(yao)參數之一,要(yao)求空氣(qi)微(wei)生(sheng)物(wu)(wu)(wu)采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)器,必須具(ju)有獲得(de)大的(de)采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)效(xiao)率,以(yi)確保采(cai)(cai)集到(dao)的(de)空氣(qi)微(wei)生(sheng)物(wu)(wu)(wu)在(zai)統計(ji)學(xue)上有顯著(zhu)性和代表性。將空氣(qi)微(wei)生(sheng)物(wu)(wu)(wu)收集在(zai)半固態的(de)營養(yang)培養(yang)基上的(de)撞擊(ji)式采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)器,采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)濃度(du)(du)一般(ban)不(bu)應超過105CFU/m3,否則會發生(sheng)超載現象。同時(shi),要(yao)求采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)器的(de)空氣(qi)采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)流(liu)量要(yao)穩定,這樣(yang)(yang)(yang)(yang)(yang)才能確保采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)性能穩定可靠。如果使用非恒流(liu)型(xing)采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)器采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)時(shi),必須經常校準(zhun)空氣(qi)采(cai)(cai)樣(yang)(yang)(yang)(yang)(yang)流(liu)量。