偶氮氯膦-mA褪色光度法测定分子筛中铈含量  

Color-Fading Spectrophotometric Determination of Cerium (Ⅳ) with Chlorophosphonazo-mA in Molecular Sieve

作　　者：丁志杰[1] 郭雨[1] 陈君华[1] 

机构地区：[1]安徽科技学院理学院,安徽凤阳233100

出　　处：《安徽科技学院学报》2009年第4期17-19,共3页Journal of Anhui Science and Technology University

基　　金：安徽科技学院科研基金资助項目(ZRC/200686)

摘　　要：在H2SO4介质中，Ce（Ⅳ）对偶氮氯膦-mA具有氧化褪色作用，表观摩尔吸光系数为ε532nm=1.92×10^4L·mol^-1·cm^-1，Ce（Ⅳ）量在0.6-4.0μg／mL范围内遵守比耳定律。考察了共存离子对测定铈的影响。方法用于测定分子筛中微量铈，结果满意。In the medium of sulfuric acid, cerium（Ⅳ） works with Chlorophosphonazo-mA to produce color - fading reaction. The apparent molar absorptivity of the determination of cerium is ε532nm=1.92×10^4L·mol^-1·cm^-1. Beer＇s law is obeyed over the concentration range of 0.6-4.0μg·mL^-1 for cerium. The influence of twenty-one diverse ions on the determination of cerium（Ⅳ）was examined. The method has been satisfactorily applied to the determination of cerium in molecular sieves.

关 键 词：偶氮氯膦-MA 褪色光度法 Ce(Ⅳ) 分子筛 

分 类 号：O611.4[理学—无机化学]