Preparethetankbyliningthewallswithsheetsoffilterpaper;pourthemobilephaseintothetank,saturatingthefi
lerpaperintheprocess,toadepthof5to10mm,colsethetankandallowtostandat2012to2512forIh.
(saturatedconditions).Whatarethepurposesoftheaboveprocedure.

A．使得到不拖尾的斑点

B．使层析罐达到饱和条件

C．使避光

D．使保持稳定

E．使滤纸湿润