DBC-偶氮氯膦褪色分光光度法测定铈(IV)(英文)  

Color-Fading Spectrophotometric Determination of Cerium (IV) with DBC-Chlorophosphonazo

作　　者：翟庆洲[1] 胡伟华[1] 张晓霞[1] 庞伟[1] 

机构地区：[1]长春理工大学,吉林长春130022

出　　处：《稀有金属材料与工程》2005年第11期1846-1848,共3页Rare Metal Materials and Engineering

基　　金：Supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Changchun University of Science and Technology, China (40103/129159)

摘　　要：在1.0 mol·L-1～2.0 mol·L-1的H2SO4介质中,Ce(Ⅳ)与DBC-偶氮氯膦反应产生褪色反应,测定铈表观摩尔吸光系数为ε530nm=4.89×104L·mol-1·crm-1,Ce(IV)浓度范围在0.020μg·mL-1～0.88μg·mL-1范围内遵守比耳定律.考察了24种共存离子对测定铈的影响.本方法已满意地用于测定分子筛中的铈.In the medium of 1.0 mol·L^-1-2.0 mol·L^-1 sulfuric acid, cerium （IV） reacts with DBC-chlorophosphonazo to produce color-fading reaction. The apparent molar absorptivity of the determination of cerium is ε530nm=4.89×10^4 L·mol^-1·cm^-1. Beer＇s law is obeyed over the concentration range of 0.020μg·ml^-1-0.88μg·ml^-1 for cerium. The influence of twenty-four 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：铈(IV) 褪色光度法 DBC-偶氮氯膦 

分 类 号：O657.3[理学—分析化学] O614[理学—化学]