X射线荧光光谱法测定混合稀土氧化物中稀土分量

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摘要：建立了X射线荧光光谱法测试稀土氧化物中稀土分量的方法，讨论了样品制作方法，提出用聚四氟乙烯制作样品底座，分析试液1 mL滴入样品底座的吸附滤纸上，烘箱或红外灯下烘干，6μm聚脂薄膜扣住测量，样品底座不吸附试样，吸附滤纸的位置及平整性由于内标的补偿不影响分析结果的准确性，初步探讨了薄试样的基体效应，测试的稀土含量范围为：La₂O₃0.01%～50%，CeO₂0.01%～15%，Pr₆O₁₁0.01%～12.5%， Nd₂O₃0.01%～40%，Sm₂O₃0.01%～40%，Eu₂O₃0.01%～10%，Gd₂O₃0.03%～40%，Tb₄O₇0.01%～5%，Dy₂O₃0.05%～10%，Ho₂O₃0.01%～4.5%，Er₂O₃0.01%～8%，Tm₂O₃0.01%～2%，Yb₂O₃0.01%～8%， Lu₂O₃0.01%～1.5%，Y₂O₃0.5%～80%，测试结果与外检吻合。方法易于操作，重现性好，适应范围广，测试了大量其他物料成分，可满足定量分析要求，已作为常规分析手段。

关键词：X射线荧光光谱法;稀土;制样方法;滤纸吸附

Abstract：A simple and rapid quantitative method for determining RE₂O₃ in rare earth oxide by X-ray fluorescence spectrometry was developed. A new method for manufacturing sample was brought up. The sample pedestal plate was lathed with polytetrafluoroethylene. A filter paper located in the sample pedestal plate was used to absorb 1 mL analytical solution, dried under infrared lamp or in stove and measured by X-ray fluorescence spectrometry with a 6μm covering film. No remainder was detected in the sample pedestal plate. Vanadium was confirmed as the internal standard to compensate the influence of the location of absorbing filter paper within the sample pedestal plate, the analytical range was large, the accuracy and precision were satisfactory, the results agreed with other methods, and the method has been used in routine analyses for ten years. Also the method for manufacturing sample has been applied to a variety of materials.

Key words：X-ray fluorescence spectrometry;Rare earth;Method for manufacturing sample;Filter paper absorbing

收稿日期: 2006-05-10 修订日期: 2006-08-20

中图分类号:

O657.3

通讯作者: 黄肇敏 E-mail: zhaomhuang@yahoo.com.cn

引用本文:

黄肇敏¹,周素莲². X射线荧光光谱法测定混合稀土氧化物中稀土分量[J]. 光谱学与光谱分析, 2007, 27(09): 1873-1877.
HUANG Zhao-min¹,ZHOU Su-lian². Method for Determination of RE₂O₃ by X-Ray Fluorescence Spectrometry. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(09): 1873-1877.

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https://www.gpxygpfx.com/CN/Y2007/V27/I09/1873