Thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS): Application for total determination of Cd, Pb and Zn in fresh waters, seawater and marine sediments Espectrofotometría de absorción atómica con tubo en la llama: Aplicación en la determinación total de cadmio, plomo y zinc en aguas frescas, agua de mar y sedimentos marinos

Gonzalez E.; Ahumada R.; Medina V.; Neira, J; Gonzalez, U

Abstract

Thermospray flame furnace Atomic Absorption Spectrometry (TS-FF-AAS) was used for the total determination of Cd, Pb and Zn in fresh water and seawater samples at ?g L-1 levels, and in marine sediment samples at ?g g-1 levels. Using a sample loop of 50 ?L and a peristaltic pump the samples were transported into the metallic tube placed over an air/acetylene flame, through a ceramic capillary (o.d. = 3.2 mm) containing two parallel internal orifices (i.d = 0.5 mm). The detection limits determined for Cd, Pb and Zn using a synthetic water matrix (2.5% m/v NaCl, 0.5% m/v MgCl2 and 0.8% m/v CaCl2) were 0.32 ?g L-1; 2.6 ?g L-1 and 0.21 ?g L-1 respectively. The methodology by TS-FF-AAS was validated by determination of Cd, Pb and Zn in certified reference materials of water and marine sediment, and the t-test for differences between means was applied. No statistically significant differences were established in fresh water and seawater (p>0.05), whereas differences became apparent in marine sediment (p<0.03).

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Título según SCOPUS: Thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS): Application for total determination of Cd, Pb and Zn in fresh waters, seawater and marine sediments [Espectrofotometría de absorción atómica con tubo en la llama: Aplicación en la determinación total de cadmio, plomo y zinc en aguas frescas, agua de mar y sedimentos marinos]
Título de la Revista: QUIMICA NOVA
Volumen: 27
Número: 6
Editorial: SOC BRASILEIRA QUIMICA
Fecha de publicación: 2004
Página de inicio: 873
Página final: 877
Idioma: Portuguese
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-23944478859&partnerID=q2rCbXpz
Notas: SCOPUS