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分享！生物試劑的取用規則
發布時間： 2022-11-26 點擊次數： 661次生物試劑一般裝在帶膠木塞的廣口瓶中，液體試劑則盛在細口瓶中（或滴瓶中），見光易分解的試劑（如硝酸銀）應裝在棕色瓶中，每一種試劑都貼有標簽以表明生物試劑的名稱、濃度、純度。生物試劑的取用規則：生物試劑可用潔凈的牛角勺取用。要取一定量的固體時，可把固體放在紙上或表面皿上在臺秤上稱量。要準確稱量時，則用稱量瓶在天平上進行稱量。液體試劑常用量筒量取，量筒的容量為：5mL、10mL、50mL、500mL等數種，使用時要把量取的液體注入量筒中，使視線與量筒內液體凹面的最小處保持水平，然后讀出量筒上的刻度，即得液體的體積。如需少量液體試劑則可用滴管取用，取用時應注意不要將滴管碰到或插入接收容器的壁上或里面。為了達到準確的實驗結果，取用生物試劑時應遵守以下規則，以保證生物試劑不受污染和不變質：1、生物試劑不能與手接觸；2、要用潔凈的藥勺，量筒或滴管取用試劑，絕對不準用同一種工具同時連續取用多種試劑。取完一種試劑后，應將工具洗凈（藥勺要擦干）后，方可取用另一種試劑；3、生物試劑取用后一定要將瓶塞蓋緊，不可放錯瓶蓋和滴管，絕不允許張冠李戴，用完后將瓶放回原處；4、已取出的試劑不能再放回原試劑瓶內。另外取用生物試劑時應本著節約精神，盡可能少用，這樣既便于操作和仔細觀察現象，又能得到較好的實驗結果。- 下一篇：epicypher產品
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