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本文介绍了用分光光度法和荧光法测定矿物和岩石中铀的方法。样品用盐酸处理后,铀从IBMK、四氢呋喃和12M 盐酸(体积比1:8:1)组成的有机溶剂体系中被离子交换柱内的道埃克斯1×8强碱性阴离子交换树脂所吸附而与母岩元素分离。接着先用有机溶剂,然后用6M 盐酸洗去铁、钼和共吸附元素,再用1M 盐酸淋洗铀。淋洗液中的铀用铀试剂Ⅲ分光光度法或荧光法测定。上述方法对测定痕量和较大量铀是否适用是通过分析很多个铀含量10~(-1)—10~4ppm 的地球化学标准样品来检验的。在所有的检验中,都获得了非常一致的结果。
This article describes a spectrophotometric and fluorometric method for the determination of uranium in minerals and rocks. After the sample was treated with hydrochloric acid, the uranium was adsorbed on the AOX 1 × 8 strongly basic anion exchange resin in the ion exchange column in an organic solvent system composed of IBMK, tetrahydrofuran and 12M hydrochloric acid (volume ratio 1: 8: 1) And separated from the parent rock element. Next, iron, molybdenum and co-adsorbed elements are washed off with organic solvent, then 6M hydrochloric acid, and then leached with 1 M hydrochloric acid. Uranium in the eluent is determined by spectrophotometry or fluorescence spectrometry with uranium reagent III. The applicability of the above method to the determination of trace amounts and relatively large amounts of uranium is examined by analyzing a number of geochemical standard samples with uranium contents of 10-1 to 4 ppm. In all the tests, we obtained very consistent results.