偶氮胂Ⅰ褪色光度法测定微量铈  

Spectrophotomertric determination of cerium by decoloring arsenazo Ⅰ

作　　者：王玉宝[1] 冯学珠[1] 

机构地区：[1]烟台师范学院化学系,山东烟台264025

出　　处：《化学工程师》2003年第4期27-28,共2页Chemical Engineer

摘　　要：基于Ce(Ⅳ )对偶氮胂Ⅰ有褪色作用 ,本文研究了分光光度法测定铈。实验表明 ,在硫酸介质中 ,有色溶液的最大吸收波长为 5 0 0nm ,表观摩尔吸光系数为 1 5 4× 10 3 ,方法的线性范围为 0～ 8 8μg/mL ,检出限为 1 6 8× 10 -10 μg/mL。该方法用于人发样中铈的测定 ,结果满意。In thsi paper,the decoloring of arsenazo Ⅰ oxidized by ceium(Ⅳ)in sulfuric acid has been sutdied.The decrease in absorbance is directly proportional to the amount of cerium.The maxium absorption is at 500nm,the detection limit was 1.68×10 -10μg/mL and the liner range of the determination was 0～8.8μg/mL.The method has been used for the determination of cerium in hair with satisfactory results.

关 键 词：偶氮胂Ⅰ褪色光度法 测定 微量铈 分光光度法 硫酸介质 

分 类 号：O657.32[理学—分析化学] O614.332[理学—化学]