Bauer-Wolf E, Wegscheider W, Posch S, Knapp G, Kolmer H, Panholzer F
Institute for Analytical Chemistry, Micro- and Radiochemistry, Graz University of Technology, Technikerstrasse 4, A-8010-Graz, Austria.
Talanta. 1993 Jan;40(1):9-15. doi: 10.1016/0039-9140(93)80137-g.
A procedure for the determination of traces of rare earth elements by inductively coupled plasma-optical emission spectrometry (ICP-OES) and X-ray fluorescence spectrometry (XRF) is presented. The samples are decomposed either by fusion with lithium tetraborate or by acid attack in a microwave oven. Separation of the rare earth elements from accompanying elements is achieved by anion exchange. For the determination by ICP-OES the samples are injected in hydrochloric acid solution, for the determination by XRF the rare earth element traces are co-precipitated with rhodizonate and tannin and measured as a thin film on a membrane filter. All preconcentration steps have been optimized and tested using radiotracers. Furthermore the rare earth element contents of some international standard reference rocks have been determined; the results are compared to the certified values and other values given in the literature. The procedure is applied to a series of petrographically identical metabasites with different degrees of metamorphism to show the mobility of those ions under metamorphic conditions.
介绍了一种通过电感耦合等离子体发射光谱法（ICP-OES）和X射线荧光光谱法（XRF）测定痕量稀土元素的方法。样品通过与四硼酸锂熔融或在微波炉中酸浸分解。通过阴离子交换实现稀土元素与伴生元素的分离。对于ICP-OES测定，样品注入盐酸溶液中；对于XRF测定，稀土元素痕量与连苯三酚红和单宁共沉淀，并作为薄膜在膜滤器上测量。所有预浓缩步骤均使用放射性示踪剂进行了优化和测试。此外，还测定了一些国际标准参考岩石的稀土元素含量；将结果与认证值和文献中给出的其他值进行了比较。该方法应用于一系列具有不同变质程度的岩石学相同的变质基性岩，以显示这些离子在变质条件下的迁移率。
