钍—氨基J酸偶氮氯膦—溴代十八烷基吡啶显色反应的研究及其应用

钍—氨基J酸偶氮氯膦—溴代十八烷基吡啶显色反应的研究及其应用 COLOR-REACTION OF TERNARY COMPLEX OF THORIUM WITH AMINO-J ACID CHLOROPHOSPHONAZO AND OCTADECYLPYRIDIUM BROMIDE AND IT’S APPLICATION 王明胜 first-author 唐清林 张华山 在1.7N盐酸溶液中,钍（Ⅳ）与氨基J酸偶氮氯膦及溴代十八烷基吡啶形成蓝绿色三元络合物,最大吸收波长为705nm,摩尔吸光系数高达1.98×10 5 l/mol·cm,高于文献报道最大值。三元络合物中钍与氨基J酸偶氮氯膦的络合比为1∶3.多数常见共存元素的允许量较大,方法选择性较好,用于矿石中微量钍的测定,结果满意。 A uew sensitive method for spectrophotometric determination of thorium （Ⅳ） with amino-J acid chlozophosphonazo and octadecylpyridium bromide has been developed. In 1.7N HCl medium Th（Ⅳ） can form a blue-green ternary complex having maxium absorption at 705nm with a ε of 1.98×10 5 1·mol -1 . cm -1 . The molar ratio of Th to R in the. Complex is 1: 3、Beer′s law is obyed for thorium of 0—15μg/25ml. Most of common metallic ions don′t inteifere the determination of thorium This method has been applied to the determination of microamounts of thorium in ores. 1986-02-01 2021-04-01 2