三氯偶氮胂速差动力学分析法测定Gd、Y二元混合物中的单一稀土  

The Determination of Individual Rare Earth in the Binary Mixture of Gd and Y by Rate Differential Kinetic Method

作　　者：陈丹华[1] 蔡汝秀[1] 林智信[1] 曾云鹗[1] Chen Danhua;Cai Ruxiu;Lin Zhixin;Zeng Yun’e(Department of Chemistry,Wuhan University,Wuhan)

机构地区：[1]武汉大学化学系

出　　处：《高等学校化学学报》1985年第11期967-971,共5页Chemical Journal of Chinese Universities

基　　金：中国科学院科学基金。

摘　　要：本文研究了稀土的三氯偶氮胂络合物与CyDTA取代反应的动力学行为,测定了反应体系的部分动力学参数,建立了动力学测定方程,利用pH3.0时,Gd、Y的三氯偶氮胂络合物与CyDTA取代反应的速率差别,采用对数外推法测定了Gd、Y二元稀土混合物中的各组份,该方法灵敏度高、准确、简便、快速。The kinetic behaviour in the substitution reaction of RE(TCA)_(2)(TCA=2-(2-arsenophenylazo)-7-(2,4,6-trichlorophenylazo)-1,8-dihydroxynaphthalene-3,6-di-sulfonic acid)with CyDTA has been studied,and some kinetic parameters of the reaction system and kinetic equation for determination have been measured and established.Gd and Y in the binary mixture have been determined by their rate difference in the ligand substitution reaction of RE(TCA)_(2)with CyDTA at pH3.01.A number of synthesized samples was analysed by logarithmic extrapolation method with good sensitivity and high precision,and it is simple and rapid.

关 键 词：取代反应 外推法 方法灵敏度 二元混合物 动力学测定 三氯偶氮胂 动力学参数 稀土混合物 

分 类 号：O65[理学—分析化学]