Determination of europium (III) by graphite furnace atomic absorption spectrometry with preconcentration by 2-thenoyl trifluoroacetone phenanthrolene modified electrode

被引：0

作者：

He, HB ^{[1
]}

Zhang, WJ

Ma, GZ

Shen, HX

机构：

[1] Shenyang Inst Technol, Dept Basic Courses, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[3] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China

来源：

CHINESE JOURNAL OF ANALYTICAL CHEMISTRY | 2001年 / 29卷 / 10期

关键词：

mixed ligands; preconcentration; atomic absorption spectrometry; europium;

D O I：

暂无

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A turgsten filament electrode decorated with a mixture of 2-Thenoyl trifluoracetone (HTTA) and phenanthrolene (phen) were used for preconcentration of europium in (CH2)(6)N-4-HCl buffer, then the electrode was put into a pyrolysis coated graphite cup( PGC) for direct atomization and measurement. The linearity range was found from 0.29 x 10(-8) to 5.9 x 10(-8) mol/L. The relative standard deviation(RSD) was 5.26% and the detection limit (C-L) was 5.9 x 10(-10) mol/L, which was 63.5% to that of HTTA modified electrode and 100-fold lower than reported value determined by pyrolysis coated graphite tube (PGT). This method is more sensitive and selective because ternary minced ligand complex was formed when using two kinds of reagents with suitable ratio. Some common metal ions including aluminum and iron were tolerated, and the interference of rare earth metals was reduced notably.

引用

页码：1125 / 1128

页数：4