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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/15596
Tipo: Artigo de Periódico
Título: Determination of copper, iron, nickel and zinc in ethanol fuel by energy dispersive X-ray fluorescence after pre-concentration on chromatography paper
Título(s) alternativo(s): Analytica Chimica Acta
Autor(es): Teixeira, Leonardo Sena Gomes
Santos, Elenir Souza
Nunes, Luana Sena
Autor(es): Teixeira, Leonardo Sena Gomes
Santos, Elenir Souza
Nunes, Luana Sena
Abstract: This paper presents an alternative analytical method employing energy dispersive X-ray fluorescence (EDXRF) to determine copper, iron, nickel and zinc ions in ethanol fuel samples after a pre-concentration procedure. Our pre-concentration strategy utilizes analyte retention on cation exchange chromatography paper, a convenient substrate for direct EDXRF measurements. The repeatability, expressed in terms of RSD of standard solutions containing 0.25 μg mL−1 of Cu, Fe, Ni and Zn, and calculated from fifteen consecutive measurements, was 2.5, 2.8, 3.0, and 2.7%, respectively. The limits of detection (LOD), defined as the analyte concentration that gives a response equivalent to three times the standard deviation of the blank (n = 10), were found to be 13, 15, 15 and 12 μg L−1 for Cu, Fe, Ni and Zn, respectively. The proposed method was applied to Cu, Fe, Ni and Zn determination in hydrated ethanol fuel samples collected from different gas stations.
Palavras-chave: Ethanol fuel
EDXRF
Metals determination
Chromatography paper
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/15596
Data do documento: 2012
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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