GB/T 12690.3-2015

Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 3: Determination of water 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3部分：稀土氧化物中水分量的测定 重量法