3,5-diBr-PADAP作锆(Ⅳ)显色剂的分光光度法研究与应用  

Chromogenic Reaction of Zirconium with 3,5-dlBrPADAP and Spectrophotometric Determination of Zirconium

作　　者：刘锦昌[1] 周奇展 

机构地区：[1]广州有色金属研究院,广州510651 [2]中南工业大学

出　　处：《分析试验室》1992年第6期24-26,共3页Chinese Journal of Analysis Laboratory

摘　　要：本文研究了在非离子表面活性剂存在下,用3,5-diBr-PADAP作锆显色剂的胶束增溶分光光度法。在pH1.0～2.0的HCl介质中,配合物吸光度最大且稳定,最大吸收值在610nm处。Zr(Ⅳ)与试剂形成1:2的配合物,摩尔吸光系数为1.10×10~5L·mol^(-1)·cm^(-1),zr(Ⅳ)量在0～30μg/25mL范围内遵守比尔定律。采用钽试剂一苯苹取分离法,适合于钽铌矿中微量锆的测定。In this paper the colour reaction of zirconium (.) with 3,5-diBr-PADAP in the presence of non-ionic surfactant is spectrophotometrically studied. In a modium of pH 1.0～2.0 hydrochloric acid, the absorption of the complex reaches maximum and becomes stable with a maximum absorption at 610nm. The ratio of zirconium to the reagent in the complex is 1:2 with an apparent molar absorptivity of 1.10×10~5L·mol^(-1)·cm^(-1). Beer's law is obeyed in the zirconium concentration range of 0～30μg/25mL. A method for the determination of trace zirconium in minerals containing tantalum and niobium after separation by extraction has been proposed which is easy in operation and has higher accuracy.

关 键 词：分光光度法 锆 显色剂 

分 类 号：O614.412[理学—无机化学]