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Chinese Standard: GB/T 12690.19-2018

Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 19:Determination of arsenic and mercury contents

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砷、汞量的测定方法。
本部分适用于稀土金属及其氧化物中砷、汞量的测定。共包含2个方法:方法1电感耦合等离子体质谱法,方法2原子荧光法。方法1测定范围:0.000 05%~0.010%,方法2测定范围:砷0.000 05%~0.010%;汞 0.000 005%~0.001 0%。当方法1与方法2测定范围出现重叠时,以方法2作为仲裁方法。

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