Determination　of　Trace　Non　Rare　Earth　Elements　in　High　Purity　Rare　Earth　Oxides　by　ICP－AES　with　Microcolumn　Preconcentration　in　a　Flow　Injection　System

作     者：吉红念 廖振环 江祖成 谢金娥 

作者机构：Wuhan Univ Wuhan China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：1995年第13卷第2期

页      面：119-124页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

主　　题：Flow injection ICP-AES Active carbon-silica gel Sodium diethyldithiocarbamate Stop-flow technique Microcolumn preconcentration High purity Eu_2O_3 

摘      要：A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described in this paper. Experimental parameters such as pH, flow rate,reagent concentration,length of reaction coil,eluent acidity,etc. were optimized. In the buffer solution of NH3. H2O/NH4Cl at pH 4. 6,Al,Cr,Cu,Fe, Pb, V and Zn can be preconcentrated and then eluted with 4. 5 mol/L nitric acid utilizing stop-flow technique. The enrichment factors were in range of 8. 1￣12. 6 with detection limits of μg/m level ,and the RSD with metals at μg/g level were 2. 3￣5. 0% (n= 7). The method proposed can reduce the matrix interference effectively , and has been applied to the determination of non-rare earth metals atμg/g level in high purity Eu2O3 with satisfactory results.