GB/T 18115.2-2006
稀土金属及其氧化物中稀土杂质化学分析方法.铈中镧、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥和钇量的测定
Chemical analysis methods of rare earth impurities in rare earth metals and their oxides Cerium.Determination of lanthanum,praseodymium,neodymium,samarium,europium,gadolinium, terbium,dysprosium,holmium,erbium,thulium, ytterbium, lutetium and yttrium cont