Ce(Ⅳ)-对乙酰基偶氮胂-十二烷基磺酸钠分光光度法测定钢样中铈  

Spectrophotometric Determination of Cerium in Steel Sample with Cerium (Ⅳ)-p-Acetylarsenazo-Sodium Lauryl Sulfonate System

作　　者：张晓霞[1] 李景梅[1] 李娜[1] 石宇[1] 

机构地区：[1]长春理工大学材料与化工学院,吉林长春130022

出　　处：《稀土》2007年第2期79-81,共3页Chinese Rare Earths

摘　　要：研究了H2SO4介质中Ce()-对乙酰基偶氮胂(ASApA)-十二烷基磺酸钠(SLS)体系分光光度性质,重点考察了某些表面活性剂对体系性能影响。该体系最大吸收波长为545nm,表观摩尔吸光系数为ε545nm=4.98×103L.mol-1.cm-1,Ce()量在2.0μg/mL^12.0μg/mL范围内遵守比耳定律。本法用于测定钢样中的铈,得到了满意结果。Spectrophotometric properties of cerium （ Ⅳ ）-p-acetylarsenazo-sodium lauryl sulfonate system were studied in the sulfuric acid medium. The effect of the surfactants on the properties of the Ce （Ⅳ）-ASApA system was observed in a major way. The maximum absorption wavelength of the system is 545 nm. The apparent molar ab- sorptivity for the determination of cerium is ε545um=4. 98× 10^3L · mo1^-1 · cm^-1. Beer＇s law is followed over the range of 2.0-12.0μg/mL of cerium（ Ⅳ ）. The method was used in the determination of cerium in steel sample. The obtained results are satisfactory.

关 键 词：铈(Ⅳ) 光度法 对乙酰基偶氮胂 十二烷基磺酸钠(SLS) 钢样 

分 类 号：O657.32[理学—分析化学] O614.33[理学—化学]