单矿物微量化学分析Ⅲ荧光分光光度法直接测定钛铁矿中铈  

Micro Analysis of Minerals Ⅵ.The Directed Determnation of Cerium in llmenit by Fluorescence Spectrophotometry

作　　者：朱玉伦 Zhu Yu-lun

机构地区：[1]中国地质科学院测试所

出　　处：《岩矿测试》1984年第4期344-346,I0008,共4页Rock and Mineral Analysis

摘　　要：铈(Ⅲ)在硫酸、高氯酸、盐酸介质中出现荧光,可以在其他希土离子存在下进行测定[1-4]。本文针对地质试样观察了32种金属成分允许存在量。铁(Ⅲ)、铬(Ⅲ)导致荧光熄灭,用盐酸羟胺还原;铊(Ⅰ)用铝片还原;铂(Ⅳ)在处理矿样过程中转化成硫酸络合物消除干扰。本法取毫克量试样经处理后,直接测定钛铁矿中铈;并对GSD系列试样中铈做了测定,结果相符。二氧化铈线性动态范围在5至800ppb可用。A rapid and simple fluorescence spectrophotometric method for determina-tion of cerium in ilmenite is studied.Ferric ion and Cr(VI)are reduced by hydroxylamine hydrochloridej Tl(1),Au(III),Pb(II),V(V),Bi(III)are reduced by aluminum foil.There is no interference from 32 kinds of metal ions common in ilmenite.Beer’s law is obeyed in the range of 5-800 ppb of cerium.Its C.V.for sample containing 2911 ppm and 78 ppm of Ce are 2.6%and 11.6%repectively(n=7).

关 键 词：铁(Ⅲ) 荧光分光光度法 盐酸羟胺 线性动态范围 金属成分 二氧化铈 荧光熄灭 盐酸介质 

分 类 号：O65[理学—分析化学]