稀土金属及其氧化物中非稀土杂质化学分析方法 第20部分：稀土氧化物中微量氟、氯的测定 离子色谱法

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 20: Determination of minor amounts of fluorine and chlorine in rare earth oxides—Ion chromatography method