铀矿石及浸出液中铝、钙、镁、铁、磷、钼的流动注射光度法分析

DETERMINATION OF Al, Ca,Mg, Fe, P, Mo IN URANIUM ORE AND ITS LEACHING SOLUTION BY FLOW INJECTION-SPECTROPHOTOMETRY

作者研究了铀矿石及浸出液中铝、钙、镁、铁、磷、钼的流动注射－光度法分析的测试条件，建立了一次溶矿连续测定多元素的简便可靠的方法。实验采用钻天青S光度法、二甲酚橙光度法、邻菲咯啉光度法、磷钼兰光度法、硫氰酸盐光度法分别测定铝、钙、镁、铁、磷、钼。方法测定范围分别是：铝0．5％～25％，钙0．5％～25％，镁0．5％～20％，铁0．5％～20％，磷0．1％～8％、钼0．02％～5％。对国家一级铀矿石标准物质进行了测定，结果与推荐值吻合，精密度＜5％。该方法适合于厂矿企业的大批量含铀矿石及浸出液中铝、钙、镁、铁、磷、钼的测定。

A flow injection-spectrophotometric method for determination of Al,Ca, Mg, Fe, P, Mo in uranium ore and its leaching solution has been investigated. Multiple elements contained in the same sample solution can be sequently determined. The colouring agents are chromazurine S, xylenol orange, 1, 10-phenanthroline, phosphomolybdic blue, thiocyanate respectiveIy. The determined content range is: Al0.5%~25%,Ca0.5%~25%,Mg0.5%~20%, Fe 0.5%~20%, P 0.1 %~8%, Mo 0.02 %~5%. The determined results accord with those of national first grade standard substances and the RSD is less than 5%. The proposed method is simple and reliable. It can be widely used in routine analysis.