The sample preparation by the filter paper method and the direct determination of major (thulium)and five neighbouring micro-rare earth element impurities in pure thulium oxide by XRF are described.

本文拟定了一种采用滤纸片法制样，X射线荧光直接测定纯氧化铥中氧化铥主量以及氧化钬、氧化铒、氧化镱、氧化镥和氧化钇等稀土杂质含量的分析方法。

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