Por favor, use este identificador para citar o enlazar este ítem:
https://repositorio.ufba.br/handle/ri/13260
metadata.dc.type: | Artigo de Periódico |
Título : | A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry |
Otros títulos : | Journal of Hazardous Materials |
Autor : | Tuzen, Mustafa Soylak, Mustafa Citak, Demirhan Ferreira, Hadla S. Korn, Maria das Graças Andrade Bezerra, Marcos de Almeida |
metadata.dc.creator: | Tuzen, Mustafa Soylak, Mustafa Citak, Demirhan Ferreira, Hadla S. Korn, Maria das Graças Andrade Bezerra, Marcos de Almeida |
Resumen : | A separation/preconcentration procedure using solid phase extraction has been proposed for the flame atomic absorption spectrometric determination of copper and nickel at trace level in food samples. The solid phase is Dowex Optipore SD-2 resin contained on a minicolumn, where analyte ions are sorbed as 5-methyl-4-(2-thiazolylazo) resorcinol chelates. After elution using 1 mol L−1 nitric acid solution, the analytes are determinate employing flame atomic absorption spectrometry. The optimization step was performed using a full two-level factorial design and the variables studied were: pH, reagent concentration (RC) and amount of resin on the column (AR). Under the experimental conditions established in the optimization step, the procedure allows the determination of copper and nickel with limit of detection of 1.03 and 1.90 μg L−1, respectively and precision of 7 and 8%, for concentrations of copper and nickel of 200 μg L−1. The effect of matrix ions was also evaluated. The accuracy was confirmed by analyzing of the followings certified reference materials: NIST SRM 1515 Apple leaves and GBW 07603 Aquatic and Terrestrial Biological Products. The developed method was successfully applied for the determination of copper and nickel in real samples including human hair, chicken meat, black tea and canned fish. |
Palabras clave : | Factorial design 5-Methyl-4-(2-thiazolylazo) resorcinol Dowex optipore SD-2 Flame atomic absorption spectrometry |
URI : | http://www.repositorio.ufba.br/ri/handle/ri/13260 |
Fecha de publicación : | 2009 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Química) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
1-s2.0-S0304389408008339-main.pdf Restricted Access | 361,52 kB | Adobe PDF | Visualizar/Abrir Request a copy |
Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.