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本文用衬钽片的石墨炉原子吸收法,研究了混合稀土氧化物中铕的测定。进行了石墨炉最佳条件的选择,试验了其他稀土元素的干扰及盐酸和硝酸酸度的影响,探讨了方法的灵敏度和精密度。结果表明,方法灵敏度高,重现性好,抗干扰能力强。样品经盐酸溶解后不经任何处理即可用校正曲线法直接进行分析,所得结果与液相色谱法、X-射线荧光法基本一致。
In this paper, graphite furnace atomic absorption method with tantalum oxide sheet was applied to study the determination of europium in mixed rare earth oxides. The optimal conditions of graphite furnace were selected, the interference of other rare earth elements and the acidity of hydrochloric acid and nitric acid were tested, and the sensitivity and precision of the method were discussed. The results show that the method has high sensitivity, good reproducibility and strong anti-interference ability. The sample was dissolved in hydrochloric acid without any treatment can be used to directly analyze the calibration curve method, the results and liquid chromatography, X-ray fluorescence method is basically the same.