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

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 investi...

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Bibliographic Details
Published in:Analytica chimica acta 1998-07, Vol.368 (3), p.281-289
Main Authors: Bermejo-Barrera, Pilar, Moreda-Piñeiro, Jorge, Moreda-Piñeiro, Antonio, Bermejo-Barrera, Adela
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chemistry
Coated graphite tubes
Exact sciences and technology
HG-ETAAS
Lead
Natural water pollution
Pollution
Sea water
Seawaters, estuaries
Spectrometric and optical methods
Water treatment and pollution
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Summary: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 60ngl−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.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(98)00214-1