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本文叙述利用分光光度法和荧光法测定矿物和岩石中铀的一种方法。在试样用盐酸处理后,铀从IBMK,四氢呋喃和12M 盐酸(1:8:1,V/V)所组成的有机溶剂体系中,吸附在强碱性阴离子交换树脂 DoweX1X8上与基质元素分离。在首先用有机溶剂体系然后用6M 盐酸洗涤除去铁、钼和共吸附的元素后,用1M 盐酸洗提铀。用偶氮胂Ⅲ分光光度法或荧光法测定洗出液中的铀。分析许多铀含量在10~(-1)-10~4ppm 范围的地球化学参考样品,检验了此法用于测定微量和较大量铀的适用性。实际上,都得到了吻合的结果。
This article describes a method for the spectrophotometric and fluorometric determination of uranium in minerals and rocks. After the sample was treated with hydrochloric acid, the uranium was separated from the matrix elements by adsorption on strongly basic anion exchange resin DoweX1X8 in an organic solvent system composed of IBMK, tetrahydrofuran and 12M hydrochloric acid (1: 8: 1, V / V) Uranium was eluted with 1 M hydrochloric acid after first washing off iron, molybdenum and co-adsorbed elements with an organic solvent system followed by 6 M hydrochloric acid. Determination of uranium in eluate with arsenazo Ⅲ spectrophotometry or fluorescence method. Analysis of many geochemical reference samples with uranium concentrations in the range of 10-1 to 4 ppm confirmed the applicability of this method to the determination of trace and larger amounts of uranium. In fact, have been consistent with the results.