GFAAS determination of zinc in fish feed and feces using slurry sampling

Mayra Anton Dib Saleh, Renato de Cássio Ferreira Neves, Fábio Arlindo Silva, Paula Martin de Moraes, Vanessa Rosa Loureiro, Paulo dos Santos Roldan, Pedro de Magalhães Padilha

Resultado de pesquisarevisão de pares

12 Citações (Scopus)

Resumo

This paper presents a simple, fast, and sensitive method to determine zinc in samples of feces and fish feed by electrothermal atomic absorption spectrometry through the direct introduction of slurries of the samples into the spectrometer's graphite tube. The procedure is based on the injection of 10 μL of an acidified aqueous solution containing 0.50% w/v of feces or feed and 0.50% v/v HNO 3 into graphite tube. The limits of detection and quantification calculated for 20 readings of the blank of the standard slurries (0.50% w/v of feces or feed devoid of zinc) were 0.04 and 0.13 μg L -1 for the standard feces slurries and 0.05 and 0.17 μg L -1 for the standard feed slurries. The proposed method was applied in studies of digestibility of zinc in different fish feeds, and their results proved compatible with that obtained from samples mineralized by acid digestion using microwave oven.
Idioma originalEnglish
Páginas (de-até)162-168
Número de páginas7
RevistaFood Analytical Methods
Volume2
Número de emissão2
DOIs
Estado da publicaçãoPublicado - jun 2009
Publicado externamenteSim

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