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dc.contributor.authorFerreira, Sergio Luis Costa-
dc.contributor.authorSantos, Hilda Costa dos-
dc.contributor.authorFerreira, Janeide Reis-
dc.contributor.authorAraújo, Neyla Margarida Lopo de-
dc.contributor.authorCosta, Antonio Celso Spinola-
dc.contributor.authorJesus, Djane Santiago de-
dc.creatorFerreira, Sergio Luis Costa-
dc.creatorSantos, Hilda Costa dos-
dc.creatorFerreira, Janeide Reis-
dc.creatorAraújo, Neyla Margarida Lopo de-
dc.creatorCosta, Antonio Celso Spinola-
dc.creatorJesus, Djane Santiago de-
dc.descriptionp. 525-530pt_BR
dc.description.abstractThe 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.pt_BR
dc.publisherJournal of the Brazilian Chemical Societypt_BR
dc.subjectcopper preconcentrationpt_BR
dc.subjectzinc preconcentrationpt_BR
dc.subjectsolid-phase extractionpt_BR
dc.subjectAmberlite XAD-2pt_BR
dc.subjectnatural waterpt_BR
dc.titlePreconcentration and Determination of Copper and Zinc in Natural Water Samples by ICP-AES After Complexation and Sorption on Amberlite XAD-2pt_BR
dc.title.alternativeJournal of the Brazilian Chemical Societypt_BR
dc.typeArtigo de Periódicopt_BR
dc.description.localpubSão Paulopt_BR
dc.identifier.numberv. 9, n. 6pt_BR
Appears in Collections:Artigo Publicado em Periódico (Química)

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