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GB/T 12690.12-2024_Chinese: Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 12: Determination of thorium and uranium contents - Inductively coupled plasma mass spectrum method (Chinese: 稀土金属及其氧化物中非稀土杂质 化学分析方法 第12部分：钍、铀量的测定 电感耦合等离子体质谱法) Note/Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working-hours typically, ASAP English versions: GB/T 12690.12-2024
