铀(Ⅵ)—铬天青S—十六烷基三甲基溴化胺三元络合物比色法测定微量铀

Photometric Determination of Trace of Uranium(Ⅵ)with Chrome Azurol S Cetyl Trimethyl Ammonium Bromide

铀(Ⅵ)—铬天青S与高分子胺胶束增溶剂形成三元络合物后,其灵敏度大大提高,但选择性较差,不易推广。本试验对铀(Ⅵ)—铬无青S—十六烷基三甲基溴化胺体系进行较详细的研究,试验了形成络合物的最佳条件,共存元素的干扰及其消除方法。实验部分一、试剂:铬天青S(CAS):0.1%水溶液十六烷基三甲基溴化胺(CTMAB):0.5%配于20%乙醇中。

A photometric determination method of uranium with chrome azurol S cetyl trimethyl ammonium bromide was studied.The optimium conditions were tested.The interferencewas eliminated by the use of extraction with 5%TOA-ditolyl solvent in 4.5N hydrochloric acid medium.This method was applied to the concentration range of 0.x-2000 ppm uranium.