CONTINUOUS-FLOW HYDRIDE GENERATION FOR THE PRECONCENTRATION AND DETERMINATION OF ARSENIC AND ANTIMONY BY GFAAS

被引：27

作者：

WALCERZ, M ^{[1
]}

GARBOS, S ^{[1
]}

BULSKA, E ^{[1
]}

HULANICKI, A ^{[1
]}

机构：

[1] UNIV WARSAW,DEPT CHEM,PASTEURA 1,PL-02093 WARSAW,POLAND

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1994年 / 350卷 / 12期

关键词：

D O I：

10.1007/BF00323660

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method has been developed for the determination of arsenic and antimony at sub-ppb level using hydride preconcentration inside the graphite furnace. The influence of the quality of the graphite surface, of its modification with palladium coating and of the ways of introducing hydride into the furnace on the analytical signal is discussed. After optimization of system parameters, detection limits of 25 and 36 pg were obtained for arsenic and antimony. Characteristic masses (for arsenic and antimony, respectively) were 31 and 33 pg/0.0044 A.s for direct injection GFAAS and 69 and 57 pg/0.0044 A.s for hydride in situ preconcentration and atomization in the palladium coated graphite tube. Therefore the overall efficiency of the hydride generation and trapping was estimated to be 45 and 58% for arsenic and antimony, respectively.

引用

页码：662 / 666

页数：5

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