GB/T 17415.1-1998
钽矿石、铌矿石化学分析方法 硅胶富集分离-丁基罗丹明B萃取光度法测定钽量
Methods for chemical analysis of Tantalum and Niobium ores--Determination of Tantalum content--Preconcentration and separation with silica gel--Butyl rhodamine B extraction photometric method
GBT17415.1-1998, GB17415.1-1998