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首页> 外文期刊>Atomic Spectroscopy >Precipitative Separation and ICP-AES Determination of Rare Earth Elements, Yttrium, Scandium, and Thorium in Different Types of Geological Samples Including Iron- and Uranium-Rich Materials
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Precipitative Separation and ICP-AES Determination of Rare Earth Elements, Yttrium, Scandium, and Thorium in Different Types of Geological Samples Including Iron- and Uranium-Rich Materials

机译：沉淀分离和ICP-AES测定不同类型地质样品（包括富含铁和铀的材料）中的稀土元素，钇，Scan和Thor

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摘要

A simple, rapid, and quantitative precipitation separation of lanthanides, Sc, and Th suitable for the spectral interference-free ICP-AES determination in geological samples is reported. After appropriate decomposition, the lanthanides, Sc, and Th are precipitated as hydroxides with sodium hydroxide using Mg as the carrier in the presence of triethanolamine as the complexing agent. After re-dissolving in hydrochloric acid, a second ammonium hydroxide precipitation is carried out in the presence of 4 mg Fe as the carrier and the solution filtered. The residue is dissolved in hydrochloric acid, and diluted to Suitable volume for ICP-AES determination. The combination of two precipitations removes the majority of the matrix elements, thus facilitating spectral interference-free determination. For uranium-rich samples, hydrogen peroxide is added prior to sodium hydroxide precipitation. The proposed method is simple and accurate. The precision (%RSD) ranges from 2-5%.
机译：报道了一种适用于地质样品中无光谱干扰ICP-AES测定的镧系元素，Sc和Th的简单，快速和定量沉淀分离方法。适当分解后，在三乙醇胺作为络合剂的情况下，以Mg为载体，用氢氧化钠将镧系元素，Sc和Th沉淀为氢氧化物。在重新溶于盐酸之后，在作为载体的4mg Fe的存在下进行第二次氢氧化铵沉淀，并将溶液过滤。将残留物溶于盐酸，并稀释至合适的体积，以供ICP-AES测定。两次沉淀的结合去除了大部分基质元素，从而有利于无光谱干扰的测定。对于富铀样品，在氢氧化钠沉淀之前添加过氧化氢。该方法简单，准确。精度（％RSD）范围为2-5％。

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