Palabras clave
peixe
cabelo
espectrometria de absorção atômica com geração de vapor frio
Cómo citar
Resumen
A Espectrometria de Absorção Atômica com Geração de Vapor Frio (CVAAS) está entre os métodos mais utilizados atualmente para a determinação de mercúrio (Hg) e metilmercúrio (MeHg) em materiais biológicos devido a vantagens, tais como: facilidade de operação, rápida resposta analítica, boa sensibilidade e baixo custo. Neste estudo apresentam-se os resultados obtidos no programa de intercomparação da Agência Internac ional de Energia Atômica (IAEA) o World-Wide Intercomparison Exercise for the Determination of Trace Elements and Methylmercury in Tuna Fish Flesh Homogenate (IAEA-436), realizado no período de outubro de 2004 a julho de 2005. A precisão e a exatidão do método para determinação de Hg e MeHg foram verificadas por meio da análise de materiais de referência com valores certificados para ambos. Os resultados obtidos apresentaram boa precisão e exatidão, com desvio padrão relativo de 2,2 a 10 % e erro relativo, de 0,4 a 12% para MeHg e desvio padrão relativo de 2,6 a 11,7% e erro relativo, de 0,9 a 3,11%, para Hg. O método apresentado mostrou-se adequado para determinação de baixos níveis destes contaminantes em amostras de cabelo e peixe e pode ser usado em estudos relacionados aos efeitos do Hg e suas espécies na saúde do ser humano.
Citas
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Derechos de autor 2009 Revista del Instituto Adolfo Lutz