Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)
Título del documento: Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)
Revista: Ecletica quimica
Base de datos:
Número de sistema: 000552578
ISSN: 0100-4670
Autores: 4
2
3
1
1
Instituciones: 1Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil,
2University of Missouri Research Reactor, Columbia, Missouri, USA, Zip code 65211, 1513 Research Park Drive.,
3Department of Exact and Earth Sciences, Federal University of São Paulo, CEP 09972-270, Diadema, SP, Brazil.,
4São Paulo State University - UNESP, Analytical Chemistry Department, P.O. Box 355, 14801-970, Araraquara – SP, Brazil.,
Año:
Volumen: 44
Número: 2
Paginación: 37-44
País: Brasil
Idioma: Inglés
Resumen en inglés This work describes a simple and rapid screening method for direct speciation of arsenobetaine (AsB) in tuna fish tissue and total As in tuna fish tissue and robalo liver using SLS-GF AAS. All procedures were proposed after careful optimization of pyrolysis and evaluation of chemical modifiers. Best results for total As were acquired using 25 µg Pd + 15 µg Mg + 0.1% w/v Triton X-100 in tuna fish (4.4 ± 0.3 mg kg-1) and 100 µg Pd + 0.1 % w/v Triton X-100 solution in robalo liver (10.3 ± 0.6 mg kg-1) as chemical modifiers. The direct speciation of AsB (3.6 ± 0.4 mg kg-1) in tuna fish was achieved when 5 µg Pd + 3 µg Mg + 0.1% w/v Triton X-100 was used as a chemical modifier. Accuracy was verified using a tuna fish certified reference material (CRM BCR 627), with statistically equivalent concentrations (Student"s t-test) for both total As and AsB.
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