Direct trace determination of lead in estuarine water using in situ preconcentration of lead hydride on Ir, Zr and W-coated graphite tubes

被引：19

作者：

Bermejo-Barrera, P ^{[1
]}

Moreda-Piñeiro, J ^{[1
]}

Moreda-Piñeiro, A ^{[1
]}

Bermejo-Barrera, A ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Fac Chem, Dept Analyt Chem Nutr & Bromatol, Santiago De Compostela 15706, Spain

来源：

ANALYTICA CHIMICA ACTA | 1998年 / 368卷 / 03期

关键词：

HG-ETAAS; coated graphite tubes; lead; sea water;

D O I：

10.1016/S0003-2670(98)00214-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Methods for the direct trace determination of lead in sea water involving hydride generation, trapping and the atomization of the hydride generated in a graphite furnace has been developed. Different permanent coated graphite tubes: iridium, tungstate and zirconium coated graphite tubes were investigated for the in situ preconcentration of lead hydride. The results obtained were compared with the ones achieved by the conventional HG-AAS. Trapping on Ir-coated graphite tubes offers the best analytical performances, with detection limits of 60 ng 1(-1). The accuracy was studied using IAEA/W-4 and SLRS-2 reference materials, and the method was applied to several sea water samples. The number of samples analyzed in an hour was 40. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：281 / 289

页数：9

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