Instituto de Química >
Artigos Publicados em Periódicos (Quimica) >

Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/12628

Title: Preconcentration and Determination of Copper and Zinc in Natural Water Samples by ICP-AES After Complexation and Sorption on Amberlite XAD-2
Other Titles: Journal of the Brazilian Chemical Society
Authors: Ferreira, Sergio Luis Costa
Santos, Hilda Costa dos
Ferreira, Janeide Reis
Araújo, Neyla Margarida Lopo de
Costa, Antonio Celso Spinola
Jesus, Djane Santiago de
Keywords: copper preconcentration;zinc preconcentration;solid-phase extraction;Amberlite XAD-2;natural water
Issue Date: 1998
Publisher: Journal of the Brazilian Chemical Society
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.
Description: p. 525-530
URI: http://www.repositorio.ufba.br/ri/handle/ri/12628
ISSN: 0103-5053
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

Files in This Item:

File Description SizeFormat
44444444444444444.pdf52.88 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


    Universidade Federal da Bahia

Contate-nos. Saiba mais sobre o RI/UFBA