GB/T 6150.9-1985
鎢精礦化學(xué)分析方法 氯代磺酚S光度法測定鈮量丁基羅丹明B萃取光度法測定鉭量
Methods for chemical analysis of tungsten concentrates--The chlorosulphophenol S photometric method for the determination niobium content--The butylrhodamine B extraction photometric method for the determinati
GBT6150.9-1985, GB6150.9-1985