三溴偶氮胂直接光度法测定镍铁基合金中铈组稀土  

Direct Photometric Determination of Cerium Group of Rare Earth in Nickel-iron-based Alloy with Tribromoarsenazo

作　　者：詹廷伟[1] 陈彬[1] 

机构地区：[1]重庆仪表材料研究所,国家仪表功能材料工程技术研究中心,重庆400700

出　　处：《重庆工业高等专科学校学报》2003年第3期4-5,7,共3页Journal of Chongqing Polytechnic College

摘　　要：在1.0mol·l-1盐酸介质中,三溴偶氮胂与稀土反应生成稳定的蓝色络合物,最大吸收波长位于630nm。稀土含量在1～25μg/25ml范围内,符合比尔定律。用EDTA-Zn和草酸作掩蔽剂,测定镍铁基合金中稀土含量,结果满意。In the hydrochloride medium of 1.0mol, rare earth reacts with tribromoarsenazo to form stable blue complex compound having its absorption maxium at 630nm.Beer′s Law is obeyed in the range of 1～25μg/25ml for rare earth.The method has been applied to the determination of rare earth in Nickel-iron-based Alloy,and satisfactory results have been got.

关 键 词：光度法 铈组稀土 三溴偶氮胂 

分 类 号：O657.3[理学—分析化学]