紫外-可见分光光度法分析溶液中微量铕  

Microanalysis of Europium in Solution by UV-VIS Spectrophotometry

作　　者：熊亮萍[1] 傅中华[1] 杨通在[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《稀有金属》2009年第5期766-768,共3页Chinese Journal of Rare Metals

基　　金：中国工程物理研究院专项基金

摘　　要：用紫外-可见分光光度法研究了在稀盐酸介质中,偶氮胂Ⅲ-Eu3+体系的显色反应条件。结果表明,其最大吸收波长λmax=654nm,当溶液的pH值为4.22时,Eu3+浓度在0～10.80μmo·lL-1范围内符合比尔定律,回归方程为A=0.0499c(μmol·L-1)-0.0005,表观摩尔吸光系数ε=4.99×104mol-1·L·cm-1。样品分析结果准确度高,方法灵敏、简便。Color reaction of arsenazo Ⅲ with Eu^3＋ was studied by UV-VIS spectrophotometry in diluted hydrochloric acid medium. The results showed that the absorption peak （λmax） was 654 nm. When the pH value of solution was 4.22, the range of Eu^3＋ concentration was 0- 10.80umol .L^-1 and obeyed Beer＇s law. Theregression equation was A = 0. 0499c （ umol· L^-1） - 0.0005. Apparent molar absorption coefficient ε was 4. 99 × 10^4 mol^-1·L·cm^-1. The result was quite accurate, and UV-VIS spectrophotometry was sensitive and convenient for microanalysis of Eu^3＋ in solution.

关 键 词：紫外-可见分光光度法 铕 偶氮胂Ⅲ 

分 类 号：O614.338[理学—无机化学] O657.32[理学—化学]