Application of factorial design in optimization of preconcentration procedure for copper determination in soft drink by flame atomic absorption spectrometry

dc.creatorCastro, MTPO
dc.creatorBaccan, N
dc.date2005
dc.date42064
dc.date2014-11-16T06:21:05Z
dc.date2015-11-26T17:23:39Z
dc.date2014-11-16T06:21:05Z
dc.date2015-11-26T17:23:39Z
dc.date.accessioned2018-03-29T00:10:58Z
dc.date.available2018-03-29T00:10:58Z
dc.identifierTalanta. Elsevier Science Bv, v. 65, n. 5, n. 1264, n. 1269, 2005.
dc.identifier0039-9140
dc.identifierWOS:000228041700029
dc.identifier10.1016/j.talanta.2004.09.002
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/54737
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/54737
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/54737
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283880
dc.descriptionIn the present paper, a procedure for preconcentration and determination of copper in soft drink using flame atomic absorption spectrometry (FAAS) is proposed, which is based on solid-phase extraction of copper(II) ions as its ion pair of 1,10-phenanthroline complexes with the anionic surfactant sodium dodecil sulphate (SDS), by Amberlite XAD-2 resin. The optimization process was carried out using 2(4-1) factorial and 22 factorial with a center point designs. Four variables (XAD-2 mass, copper mass, sample flow rate and elution flow rate) were regarded as factors in the optimization. Student ' s t-test on the results of the 2(4-1) factorial design with eight runs for copper extraction. demonstrated that the factors XAD-2 mass and sample flow rate in the levels studied are statistically significant. The 2 2 factorial with a center point design was applied in order to determine the Optimum conditions for extraction. The procedure proposed allowed the determination of copper with detection limits (3 alpha/S) of 3.9 mu g 1(-1). The precision, calculated as relative standard deviation (R.S.D.) was 1.8% for 20.0 mu gl(-1) of copper. The preconcentration factor was 100. The robustness of this procedure is demonstrated by the recovery achieved for determination of copper ill the presence of several cations. This procedure was applied to the determination of copper in soft drink samples collected in Campinas, SP, Brazil. (c) 2004 Elsevier B.V. All rights reserved.
dc.description65
dc.description5
dc.description1264
dc.description1269
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationTalanta
dc.relationTalanta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectcopper
dc.subjectfactorial design
dc.subjectflame atomic absorption spectrometry (FAAS)
dc.subjectsoft drink
dc.subjectEmission-spectrometry
dc.subjectTrace Amounts
dc.subjectSilica-gel
dc.subjectSystem
dc.subjectWater
dc.subject1,10-phenanthroline
dc.subjectInjection
dc.subjectSamples
dc.titleApplication of factorial design in optimization of preconcentration procedure for copper determination in soft drink by flame atomic absorption spectrometry
dc.typeArtículos de revistas


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