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作萤光粉用的氧化钇和氧化铕要求测定铜、铅、铁、镍等杂质的含量。我们曾建立了利用微量萃取和微量取样技术相结合测定高纯稀土氧化物中铜、铅、铁、镍的方法,但因作为制备高纯氧化物的原料或其它粗产品中杂质含量较高,需要建立适合于分析这类样品的简单、快速的分析方法。本文研究了用微量取样技术从少量稀土溶液中直接连续测定铜、铅、铁、镍的方法。此法的优点是:1,取样量少。这对于某些难得的贵重稀土(如铕)的分析是非常重要的;2.由于取样少,溶解样品所需的试剂少,溶
Yttrium oxide and europium oxide used for phosphor are required to determine the content of impurities such as copper, lead, iron and nickel. We have established a method for the determination of copper, lead, iron and nickel in high-purity rare earth oxides by the combination of micro-extraction and micro-sampling. However, due to the high content of impurities in the raw materials for the production of high-purity oxides or other crude products, There is a need to establish a simple and rapid analytical method suitable for the analysis of such samples. In this paper, the direct and continuous determination of copper, lead, iron and nickel from a small amount of rare earth solution by micro-sampling technique is studied. The advantages of this method are: 1, sampling less. This is important for the analysis of some rare precious rare earths (such as europium); 2. Because of the small number of samples required to dissolve the sample less soluble