二溴羧基偶氮胂直接光度法测定镍基合金中微量铈及铈组稀土  

Direct Photometric Determination of Microamounts Cerium and Cerium Group Rare Earths in Nickel-Base alloys with ASA-DBA

作　　者：陈利荣 金伟 

出　　处：《上海钢研》1995年第2期50-53,共4页Journal of Shanghai Iron and Steel Research

摘　　要：在0.3mol/L硫酸介质中,铈与二溴羧基偶氮胂形成兰紫色配合物,其最大吸收位于632nm处,表观摩尔吸光系数为1.40×10~5。反应选择性好,可不经分离直接测定镍基合金中微量铈及铈组稀土。In 0.3mol/L H2SO4 medium, Cerium reacts with ASA -DBA to form blue Complex, its absoiption maximum is at 632 nm with apparent molai abso rptivity of 1.40×105. The sabctivity is good. Micioamounts of cerium and cerium group rare eaiths in nickel-base alloys can be determined directly with out separation.

关 键 词：二溴羧基偶氮胂 分光光度法 铈及铈组稀土 

分 类 号：TF4[冶金工程—钢铁冶金]