Forsolution(1)heattoboiling0.5gpowderwith5
题型:多项选择题
问题:
Forsolution(1)heattoboiling0.5gpowderwith5mlofethanol,coolandcentrifuge,decantmesupernatantliquidimmediatelyandusewithin30minutes.Whatproceduresareemployedintheaboveexperiment
A.取用0.58粉末
B.粉末在5mL乙醇中加热
C.冷却
D.离心
E.离心后立即取出上清液并于30分钟内使用