GB/T 12690.2-2015

Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 2: Determination of ignition loss content of rare earth oxides—Gravimetric method

稀土金属及其氧化物中非稀土杂质化学分析方法 第2部分：稀土氧化物中灼减量的测定 重量法