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国产胺型萃取剂N_(235)对U的萃取性能已有研究,本文作者亦报导了用丙铜作混溶剂,偶氮胂Ⅲ为显色剂,直接光度测定N_(235)-二甲苯中微量U.但当较大量的Cu、Fe、Cd、Mn、Al、Cr、Co、Ni存在下,利用N_(235)作萃取剂光度测定微量U,目前尚未见报导.本文研究了在硫酸介质中,用N_(235)-二甲苯萃取微量铀的条件,试验了近20种共存离子的干扰情况及消除方法,拟定了较大量Cu、Fe、Cd、Mn、Mg、Al、Cr、Co、Ni等金属离子存在下,微量U的测定方法.方法简单快速、易于掌握,结果满意.
The extraction performance of domestic amine-based extractant N_ (235) has been studied. The author also reported that using copper (Ⅲ) as a solvent and arsenazo Ⅲ as a chromogen, However, there is no report on the determination of trace U by N_ (235) as extractant in the presence of a large amount of Cu, Fe, Cd, Mn, Al, Cr, Co and Ni.It has not been reported so far in sulfuric acid medium Fe, Cd, Cd, Mn, Mg, Al, Cr, Co, Fe and Co were prepared by the extraction of trace uranium with N_ (235) - xylene and the interference of nearly 20 kinds of coexisting ions were studied. Ni and other metal ions in the presence of trace U Determination of the method is simple and quick, easy to grasp, the results are satisfactory.