稀土-氨基J酸偶氮氯膦-氯代十四烷基吡啶-乙醇多元络合物的研究及分析应用  

STUDIES ON COLOR REACTIONS OF THE POLYCOMPONENT COMPLEXES IN THE SYSTEM OF RARE EARTH ELEMENTS——AMINO-J ACID CHLOROPHOSPHONAZO-TPC-C_(2)H_(5)OH AND ITS APPLICATION IN ANALYTICAL CHEMISTRY

作　　者：黎心懿[1] 陈震华[1] 曾云鹗[1] Li Xinyi;Chen Zhenhua;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》1983年第5期553-556,共4页Chemical Journal of Chinese Universities

摘　　要：本文研究了氨基-J酸偶氮氯膦在阳离子表面活性剂存在下与稀土元素形成多元络合物的显色反应,并进行了实样分析。Color reactions of rare earths with high sensitivity and selectivity based on the formation of polycomponent complexes in the system of RE-amino-J acid chlorophosphonazo-TPC-C_(2)H_(5)OH have been investigated.In acid medium(0.1-0.3N HCl)in the presence of cationic surface-active agent TPC and ethyl alcohol,amino-J acid chlorophospho-nazo with rare earths reacts to form blue colored complexes.The maximum absorption of the complex of cerium was observed at 695nm.The molor absorptivity of the complex of cerium was 2.01×10^(5)l^(-1).mol^(-1).cm^(-1).Under the same condition,heavier rare earths do not convert to corresponding complexes.The color remains stable for 1 hr.Beer’s law is obeyed over the range 0-12μg/25ml Ce.Many cations and ani-ons do not interfere.The method has been applied to the determination of RE in steel and the results of determination are found to be satisfactory.

关 键 词：多元络合物 显色反应 阳离子表面活性剂 稀土元素 偶氮氯膦 烷基吡啶 氨基J酸 

分 类 号：O65[理学—分析化学]