铕-结晶紫缔合物分光光度法测定痕量铕  

A Sensitive Spectrophotometric Method for the Dectermination of Europium Based on the Europium-Crystal Violet Reaction

作　　者：朱国辉[1] 张韬顺[1] 郑志勇[1] 

机构地区：[1]漳州职业技术学院食品与生物工程系,福建漳州363000

出　　处：《分析测试技术与仪器》2006年第3期181-183,共3页Analysis and Testing Technology and Instruments

摘　　要：在碱性（pH10．10）条件下，铕（Ⅲ）与结晶紫形成缔合物，表观摩尔系数为=1．8×10^5L／（mol·cm），铕的浓度在0．15～1．2mg／l范围内遵守比耳定律，组成摩尔比为Eu：CV=1：2．A high sensitive spectrophotometric method was develop for the determination of Europium. Europium reacts with crystal violet in the presence of NH3（pH 10. 10±0.05） to form a violet complex. The ion association complex exhibits maximum absorption at 590 nm with an apparent molar absorpbtivity of 1.8×10^5 L/（mol ·cm）. Beer＇law is obeyed in the range of 0. 15～1.2mg/L for Eu^3＋. The molar ratio of the components of Eu ： CV is 1： 2 . The composition of association complex has been discussed. The proposed method has been used for the determination of Eu^3＋ in imitative samples with satisfactory results.

关 键 词：铕 结晶紫 缔合物 分光光度法 

分 类 号：O657.7[理学—分析化学]