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研究了利用火焰原子吸收光谱法(FAAS)间接测定高纯稀土氧化铕中的痕量氯离子时,高纯氧化铕基体溶液对氯离子测定产生的干扰效应及消除干扰的方法。柠檬酸及8-羟基喹啉都可作为基体改进剂,且对不同含量的稀土基体溶液,其作用效果不同。以在2%的氧化铕基体溶液中,加入1%的柠檬酸为最佳。该法灵敏度高,线性范围是0.0—9.0mg/L,相关系数是0.9998,检出限1.8μg/L,相对标准偏差为3.3%,回收率为95.7%—100.2%。
The interference effect of high purity europium oxide matrix solution on determination of chloride ion and the method of eliminating interference when indirect determination of trace chloride ion in high purity rare earth europium oxide by flame atomic absorption spectrometry (FAAS) were studied. Citric acid and 8-hydroxyquinoline can be used as a matrix modifier, and for different levels of rare earth matrix solution, the effect is different. In 2% europium oxide matrix solution, adding 1% citric acid is the best. The method has high sensitivity, the linear range is 0.0-9.0mg / L, the correlation coefficient is 0.9998, the detection limit is 1.8μg / L, the relative standard deviation is 3.3% and the recovery is 95.7% -100.2%.