Determination of nickel in water by electrothermal atomic absorption spectrometry with preconcentration on a tungsten foil

被引：16

作者：

Ohta, K ^{[1
]}

Ishida, K ^{[1
]}

Itoh, S ^{[1
]}

Kaneco, S ^{[1
]}

Mizuno, T ^{[1
]}

机构：

[1] Mie Univ, Fac Engn, Dept Chem Mat, Tsu, Mie 514, Japan

来源：

MIKROCHIMICA ACTA | 1998年 / 129卷 / 1-2期

关键词：

preconcentration; adsorption on tungsten foil; nickel; electrothermal atomic absorption spectrometry; water;

D O I：

10.1007/BF01246860

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A preconcentration method for nickel in waters involving adsorption on tungsten foil, followed by electrothermal atomic absorption spectrometry (ETAAS) with a tungsten tube atomizer is described. The most suitable pH for nickel adsorption was 5 and the optimum immersion time was 2 min. Severe interferences from co-existing elements (Al, Ca, Cu, Fe, K, Mg, Na, Pb and Zn) on the Ni AA signal were observed. Under optimal conditions, the preconcentration of nickel on W foil could eliminate interferences from these elements. The detection limit of nickel by preconcentration-ETAAS was 0.1 ng/ml (3S/N). The method with preconcentration on tungsten foil was applied to the determination of nickel in river water. The recovery of spiked nickel was 93-102%. The tungsten foil preconcentration method is sensitive, simple, and convenient. This adsorption method can be utilized in in situ-sampling of ultra-trace nickel in environmental samples (water). Furthermore, after sampling it is easy to carry and store the W-foil without contamination for long time.

引用

页码：127 / 132

页数：6

共 27 条

[1]

ALONSO EV, 1993, ANAL CHIM ACTA, V283, P224

[2] DETERMINATION OF TRACE-METALS IN SEAWATER BY GRAPHITE-FURNACE ATOMIC-ABSORPTION FOLLOWING ONLINE SEPARATION AND PRECONCENTRATION [J].