Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides—Part 18:Determination of zirconium content
全国稀土标准化技术委员会(SAC/TC 229)
GB/T 12690的本部分规定了稀土金属及其氧化物中锆含量的测定方法。本部分适用于稀土金属及其氧化物中锆含量的测定，包含两个方法，方法1〓电感耦合等离子体发射光谱法，方法2〓电感耦合等离子体质谱法。方法1的测定范围：0.010％～0.20%；方法2的测定范围：0.000 5％～0.010%。
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