Um novo método para quantificar mercúrio orgânico (Hg orgânico) empregando a espectrometria de fluorescência atômica do vapor frio
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Data
2006-12-01
Autores
Bisinoti, Márcia Cristina [UNESP]
Jardim, Wilson F.
Brito Júnior, José Lailson
Malm, Olaf
Guimarães, Jean Remy
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
In this work a simple and sensitive procedure to extract organic mercury from water and sediment samples, using methylene chloride in acidic media followed by CVAFS quantification has been developed. The method was evaluated for possible interferents, using different inorganic mercury species and humic acid, no effects being observed. The detection limit for organic mercury was 160 pg and 396 pg for water and sediment samples respectively. The accuracy of the method was evaluated using a certified reference material of methylmercury (BCR-580, estuarine sediment). Recovery tests using methylmercury as surrogate spiked with 1.0 up to 30.0 ng L-1 ranged from 90 up to 109% for water samples, whereas for sediments, recoveries ranged from 57 up to 97%.
Descrição
Palavras-chave
methylmercury, bromine chloride, environmental samples
Como citar
Química Nova. Sociedade Brasileira de Química, v. 29, n. 6, p. 1169-1174, 2006.