摘要
提出一种简便、快速测定合金中微量铈的分析方法。在ｐＨ２～３的介质中，以偶氮氯膦－ｍｓ显色，λｍａｘ＝６４４ｎｍ，ε＝４．７６×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，铈的含量在０～２５μｇ／２５ｍＬ范围符合比耳定律，大量镁、锰等不干扰。此法已成功地用于镁锰合金试样分析。
A simple and rapid spectrophotometric method for the determination of trace cerium in alloy has been deyeloped. Cerium reactswith chlorphosphonazo-ms to form a blue complex at PH 2-3 .The complexexhibits a maximum absorption at 664urn with an apparent molar absorptivity of 4.76X 10'Lmol-loin-1.Beer's law is obeyed for 0-25pg of Ce in25ml of solution.The method bas been applied to the determination ofcerium in alloy magnesium.
出处
《稀有金属与硬质合金》
CAS
CSCD
1995年第2期24-27,共4页
Rare Metals and Cemented Carbides
关键词
铈
镁合金
分光光度法
微量分析
cerium
chlorphosphonazo-ms
alloy magnesium
spectrophotometry
