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dc.contributor.authorSantos, Walter Nei Lopes dos-
dc.contributor.authorCosta, Jorge L. O.-
dc.contributor.authorAraujo, Rennan Geovanny Oliveira-
dc.contributor.authorJesus, Djane S. de-
dc.contributor.authorCosta, Antonio Celso Spinola-
dc.creatorSantos, Walter Nei Lopes dos-
dc.creatorCosta, Jorge L. O.-
dc.creatorAraujo, Rennan Geovanny Oliveira-
dc.creatorJesus, Djane S. de-
dc.creatorCosta, Antonio Celso Spinola-
dc.description.abstractIn the present paper, a minicolumn of polyurethane foam loaded with 4-(2-pyridylazo)-resorcinol (PAR) is proposed as pre-concentration system for cadmium determination in drinking water samples by flame atomic absorption spectrometry. The optimization step was performed using two-level full factorial design and Doehlert matrix, involving the variables: sampling flow rate, elution concentration, buffer concentration and pH. Using the established experimental conditions in the optimization step of: pH 8.2, sampling flow rate 8.5 mL min−1, buffer concentration 0.05 mol L−1 and elution concentration of 1.0 mol L−1, this system allows the determination of cadmium with detection limit (LD) (3σ/S) of 20.0 ng L−1 and quantification limit (LQ) (10σ/S) of 64 ng L−1, precision expressed as relative standard deviation (R.S.D.) of 5.0 and 4.7% for cadmium concentration of 5.0 and 40.0 μg L−1, respectively, and a pre-concentration factor of 158 for a sample volume of 20.0 mL. The accuracy was confirmed by cadmium determination in the standard reference material, NIST SRM 1643d trace elements in natural water. This procedure was applied for cadmium determination in drinking water samples collected from Salvador City, Bahia, Brazil. For five samples analyzed, the achieved concentrations varied from 0.31 to 0.86 μg L−1.pt_BR
dc.publisherJournal of Hazardous Materialspt_BR
dc.subjectCadmium determinationpt_BR
dc.subjectDrinking waterpt_BR
dc.titleAn on-line pre-concentration system for determination of cadmium in drinking water using FAASpt_BR
dc.title.alternativeJournal of Hazardous Materialspt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv.137, n.3pt_BR
Appears in Collections:Artigo Publicado em Periódico (Química)

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