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.
出处
《稀土》
EI
CAS
CSCD
北大核心
2007年第2期79-81,共3页
Chinese Rare Earths
