ICP－AES法测定氧化铕中14种数量稀土杂质

ICP-AES Determination of Rare Earth Im-purities in Europium Oxide

采用ＩＣＰ－ＡＥＳ单道扫描光谱仪详细考察了十四种被测稀土杂质元素的４７条灵敏分析线的谱线轮廓及基体Ｅｕ的背景谱线轮廓，从而选定基体干扰小，灵敏度高的分析线及扣除背景的合适位置；试验了酸度，载气流量，观测高度，射频发生器功率等对信号强度和基体干扰程度的影响，采用基体匹配法校正基体对测定的影响，建立了氧化铕中１４种稀土杂质的直接测定法。已用于出口产品的分析和标准试样的定值测定，得到了满意的结果。

he 14 analytical lines for 14 rare earth im-purities were selected by considering their spec-tral profile and background pattern drawn withsequential ICP-AES spectrometer. The influ-ences of acidity,ICP parameters and observiationheight were investigated. The matrix interfer-ences can be eliminated by using matrix matchor standard addition method.The method pro-posed has been successfully used in the determi-nation of rare earth impurities in Eu_2O_3 and theanalytical result s of practical samples are satis-factory.