摘要
在pH2.0的HCl-KCl溶液中,安替吡啉偶氮Ⅲ与稀土形成蓝色配合物,铈、镱配合物的表观摩尔吸光系数分别为:εCe=7.917×10^4L·mol^-l·cm^-1,εYb=4.759×10^4L·mol^-1·cm^-1。稀土(Ⅲ)的质量浓度在0~1.2μg·ml^-1范围内符合比耳定律。方法灵敏可靠,用本法测定人工合成样品中稀土的总量,结果满意。
In pH 2.0 HCl-KC1 solution rare earths react with antipyrylazo m to form a blue complex. The molar absorptivity of the complex with Ce is εce = 7.917×10^4 L· mol^-l·cm^-1 and with Yb is εYb=4.759 ×10^4 L·mo1^-1·cm^-1. Beer's law is obeyed forCe^3+ and Yb^3+ in the range of 0-1.2 μg·m1^-1. The method is sensitive and credible. The method has been applied to the direct determination of rare earths synthesized sample with satisfactory results.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2006年第3期423-425,共3页
Chinese Journal of Rare Metals
基金
国家自然科学基金资助项目(50574023)
辽宁省教育厅科学研究资助项目(20040294)
关键词
安替吡啉偶氮Ⅲ
光度法
稀土
antipyrylazo Ⅲ
spectrophotometry
rare earths