DBF-偶氮胂与稀土元素显色反应的研究及其分析应用  

Study of Colour Reaction of DBF-Arsenazo with Rare Earth Elements and Its Application

作　　者：杨屹[1] 蔡汝秀[1] 余席茂[1] 曾云鹗[1] 

机构地区：[1]武汉大学化学系

出　　处：《冶金分析》1989年第2期17-20,共4页Metallurgical Analysis

摘　　要：本文研究了新显色剂DBF-偶氮胂与稀土元素显色反应的条件,实验表明,DBF-偶氮胂可在高酸度下（1.5MHCl）与铈组稀土形成稳定的蓝色络合物,最大吸收波长在630nm附近,摩尔吸光系数可达1.28×10³,大多数常见金属离子的干扰允许量可达毫克级以上,是一种高灵敏度、高选择性优良的铈组稀土显色剂。用H₂O₂—抗坏血酸联合掩蔽基体钛,测定了钛合金中铈组稀土的含量,方法简单,结果令人满意。In this paper,the colour reaction of rare earth elements with DBF-arsenazo has been studied. The experiments showed that the stable complexes can form in 1.5 M HC1 solution. The molar absorptivity (s) of Ce is 1.28X103.The tolerance quantity of many metal ion interferences is at milligram level. The content of light rare earth elements in titanium alloy was determined by-masking titanium with hydrogen peroxide and ascorbic acid.

关 键 词：偶氮胂 稀土元素 显色反应 钛合金 

分 类 号：TG146.23[一般工业技术—材料科学与工程]