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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/12628
Tipo: Artigo de Periódico
Título: Preconcentration and Determination of Copper and Zinc in Natural Water Samples by ICP-AES After Complexation and Sorption on Amberlite XAD-2
Título(s) alternativo(s): Journal of the Brazilian Chemical Society
Autor(es): Ferreira, Sergio Luis Costa
Santos, Hilda Costa dos
Ferreira, Janeide Reis
Araújo, Neyla Margarida Lopo de
Costa, Antonio Celso Spinola
Jesus, Djane Santiago de
Autor(es): Ferreira, Sergio Luis Costa
Santos, Hilda Costa dos
Ferreira, Janeide Reis
Araújo, Neyla Margarida Lopo de
Costa, Antonio Celso Spinola
Jesus, Djane Santiago de
Abstract: The present paper describes a procedure for separation, preconcentration and sequential determination of trace amounts of copper and zinc in natural water samples, by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The proposed method is based on the complexation of copper(II) and zinc(II) ions by 1-(2-thiazolylazo)-2-naphthol (TAN) and sorption on to Amberlite XAD-2 resin. Parameters such as: TAN amount, pH effect on the complexation and sorption of TAN complexes, agitation time for complete sorption, concentration of metal ion, mass of Amberlite XAD-2, desorption of metal ions from XAD-2 resin and sample volume were studied. The results demonstrated that the copper(II) and zinc(II) ions, in the range of 0.10 to 100.00 mg, contained in a solution sample volume of 400 mL, in the pH range of 5.7 to 8.3, on the form of TAN complexes had been quantitatively retained on to XAD-2 resin. The shaking time required for sorption is 1 h using a resin mass of 1.4 g. The solution for determination of copper and zinc by ICP-AES is obtained, after desorption of the ions from the XAD-2 resin, using 5 mL of 2 mol L-1 hydrochloric acid and shaking the system for 5 min. The procedure was applied to the determination of copper and zinc in several natural water samples. The standard addition technique was applied and the obtained recoveries revealed that the proposed procedure has a good accuracy. A high enrichment factor (80) and simplicity are the main advantages in this analytical protocol.
Palavras-chave: copper preconcentration
zinc preconcentration
solid-phase extraction
Amberlite XAD-2
natural water
Editora / Evento / Instituição: Journal of the Brazilian Chemical Society
URI: http://www.repositorio.ufba.br/ri/handle/ri/12628
Data do documento: 1998
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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