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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/14728
Tipo: Artigo de Periódico
Título: Multi-element determination of Cu, Fe, Ni and Zn content in vegetable oils samples by high-resolution continuum source atomic absorption spectrometry and microemulsion sample preparation
Título(s) alternativo(s): Food Chemistry
Autor(es): Fernandes, Andréa Pires
Nunes, Luana Sena
Barbosa, José Tiago Pereira
Lemos, Valfredo Azevedo
Santos, Walter Nei Lopes dos
Korn, Maria das Graças Andrade
Teixeira, Leonardo Sena Gomes
Autor(es): Fernandes, Andréa Pires
Nunes, Luana Sena
Barbosa, José Tiago Pereira
Lemos, Valfredo Azevedo
Santos, Walter Nei Lopes dos
Korn, Maria das Graças Andrade
Teixeira, Leonardo Sena Gomes
Abstract: The aim of this work was to evaluate the microemulsification as sample preparation procedure for determination of Cu, Fe, Ni and Zn in vegetable oils samples by High-Resolution Continuum Source Flame Atomic Absorption Spectrometry (HR-CS FAAS). Microemulsions were prepared by mixing samples with propan-1-ol and aqueous acid solution, which allowed the use of inorganic aqueous standards for the calibration. To a sample mass of 0.5 g, 100 μL of hydrochloric acid and propan-1-ol were added and the resulting mixture diluted to a final volume of 10 mL. The sample was manually shaken resulting in a visually homogeneous system. The main lines were selected for all studied metals and the detection limits (3σ, n = 10) were 0.12, 0.62, 0.58 and 0.12 mg kg−1 for Cu, Fe, Ni and Zn, respectively. The relative standard deviation (RSD) ranged from 5% to 11 % in samples spiked with 0.25 and 1.5 μg mL−1 of each metal, respectively. Recoveries varied from 89% to 102%. The proposed method was applied to the determination of Cu, Fe, Ni and Zn in soybean, olive and sunflower oils.
Palavras-chave: Metals analysis
Vegetable oil
HR-CS FAAS
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/14728
Data do documento: 2011
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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