The reference [img=,12,20]mk:@MSITStore:C:\Documents%20and%20Settings\jie.chen\桌面\新建文件夹\美国药典32版（USP%2032）附录\USP%2032.chm::/pub/data/images/chars/lang.gif[/img]197M[img=,12,20]mk:@MSITStore:C:\Documents%20and%20Settings\jie.chen\桌面\新建文件夹\美国药典32版（USP%2032）附录\USP%2032.chm::/pub/data/images/chars/rang.gif[/img] in a monograph signifies that the substance under examination is finely ground and dispersed in mineral oil.

上述mineral oil指的是什么牌号矿物油？