摘要
合成了新显色剂二溴对甲基偶氮磺并用于铈组稀土元素的光度测定。在酸性介质中，试剂与铈等稀土元素形成蓝色络合物，在６３３ｎｍ处具有最大吸收。铈含量在０～２０μｇ／２５ｍｌ范围内符合比尔定律，方法应用于钢铁中铈组稀土的直接测定，有良好的准确性和重现性。
A new reagent dibromo-p-methylsulfonazo has been synthesized and a method of its spectrophotometric determination of cerium subgroup rare earth elements has also been studied.In acid medium,cerium reacts with the reagent to form a blue complex which has an absorption maximum at 633nm. Beer's law is obeyed for 0-20μg of cerium in 25ml of solution.The method has been applied to the direct determination of cerium subgroup rare earth elements in steel with satisfactory accuracy and preasion.
出处
《冶金分析》
CAS
CSCD
北大核心
1996年第4期1-3,共3页
Metallurgical Analysis
关键词
光度法
铈组稀土元素
偶氮磺类
显色剂
Spectrophotometry,Dibromo-p-methylsulfonazo,Cerium subgroup rare earth elements
