三溴偶氮胂吸光光度法测定稀土精矿中铈组稀土元素  

Determination of Cerium-Group Elements in Rare Earth Concentrate by Spectrophotometry with Tribromocarboxy Arsenaxo

作　　者：张弘强[1] 郝冬梅[1] 张雪梅[2] 张翼明[1] 白丽萍[1] 

机构地区：[1]包头稀土研究院,内蒙古包头014030 [2]包头市自来水公司,内蒙古包头014030

出　　处：《稀土》2007年第2期77-78,共2页Chinese Rare Earths

摘　　要：研究了三溴偶氮胂光度法测定稀土精矿中铈组稀土元素。实验选择了最大吸收波长为640nm,显色酸度为0.24mol/L^1.44mol/L盐酸,当稀土的浓度在0μg/mL^1.6μg/mL范围内符合比尔定律,考察了共存元素的干扰情况。方法回收率在100.8%~101.6%之间,相对标准偏差RSD<2%。In this paper ,we have studied determination of the cerium-group rare earth elements in rare earth concentrate by spectrophotometry with tribromocarboxy arsenaxo. Maximum absorption wavelength was elected,as 640nm. The chromogrnic acidity of hydrochloric acid is 0. 24 mol/L-1. 44 mol/L. Beer＇s law is obeyed in the range of 0μg/mL-1. 6μg/mL of rare earth concentration. We have also investigated the influence of coexistent elements. Recovery of the method is 100, 8%- 101.6% ,RSD〈2%.

关 键 词：三溴偶氮胂 稀土精矿 铈组稀土元素 

分 类 号：O657.32[理学—分析化学] O614.33[理学—化学]