Chemical analysis methods of non-rare earth impurities in rare earth metals and the oxides—Part 17:Determination of niobium and tantalum contents of rare earth metals
全国稀土标准化技术委员会(SAC/TC 229)
GB/T 12690的本部分方法1规定了单一稀土金属中铌、钽含量的测定方法。
本部分方法1适用于单一稀土金属中铌、钽含量的测定。测定范围：铌0.010％～0.50%；钽0.020%～0.50％。
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