https://repositorio.ufba.br/handle/ri/14728
metadata.dc.type: | 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 |
Otros títulos : | Food Chemistry |
Autor : | 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 |
metadata.dc.creator: | 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 |
Resumen : | 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. |
Palabras clave : | Metals analysis Vegetable oil HR-CS FAAS |
metadata.dc.rights: | Acesso Aberto |
URI : | http://repositorio.ufba.br/ri/handle/ri/14728 |
Fecha de publicación : | 2011 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Química) |
Fichero | Descripción | Tamaño | Formato | |
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Andréa P. Fernandes.pdf | 160,06 kB | Adobe PDF | Visualizar/Abrir |
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