Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil

Detalhes bibliográficos
Autor(a) principal: Korn, Maria das Graças Andrade
Data de Publicação: 2004
Outros Autores: Ferreira, Adriana Costa, Costa, Antonio Celso Spinola
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/5057
Resumo: p. 77– 83
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spelling Korn, Maria das Graças AndradeFerreira, Adriana CostaCosta, Antonio Celso SpinolaKorn, Maria das Graças AndradeFerreira, Adriana CostaCosta, Antonio Celso Spinola2012-01-06T23:51:16Z2012-01-06T23:51:16Z20041095-9149http://www.repositorio.ufba.br/ri/handle/ri/5057v. 78.p. 77– 83A method for preconcentration and determination of trace amounts of cadmium in high saline samples is described. It is based on the adsorption of the metal in the activated carbon as complex cadmium(II)–4-(2-pyridylazo-resorcinol) (PAR). The final determination was carried by flame atomic absorption spectrometry (FAAS). The optimization of extraction parameters such as the pH effect, PAR mass, activated carbon mass and shaking time was carried out using a two-level full factorial design (24) and two Doehlert matrix designs. The results of the factorial design, considering the analysis of variance (ANOVA), demonstrate that all these factors are statistically significant, as well as the interactions (pH PAR mass), (pH activated carbon mass) and (activated carbon mass shaking time). The final optimization was carried out using Doehlert matrix designs considering the results of the factorial design. The recoveries were quantitative (96.0–106.7%) for seawater samples spiked with Cd at concentrations of 0.125 and 0.625 Ag lÿ1. A preconcentration factor of 149 was obtained. The effect of diverse metallic ions on the proposed procedure was investigated too. The procedure was used for cadmium determination in surface seawater samples collected in Salvador City, Brazil. The cadmium content in the analysed samples varies from 0.035 to 0.17 Ag lÿ1. These results are agreement with other data reported in the literature.Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-06T23:51:16Z No. of bitstreams: 1 0-S0026265X04000712-main.pdf: 514416 bytes, checksum: ed72e0e437729b1fcfb7dce842216948 (MD5)Made available in DSpace on 2012-01-06T23:51:16Z (GMT). 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dc.title.pt_BR.fl_str_mv Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
dc.title.alternative.pt_BR.fl_str_mv Microchemical Journal
title Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
spellingShingle Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
Korn, Maria das Graças Andrade
Preconcentration
Cadmium
PAR
title_short Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
title_full Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
title_fullStr Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
title_full_unstemmed Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
title_sort Preliminary evaluation of the cadmium concentration in seawater of the Salvador City, Brazil
author Korn, Maria das Graças Andrade
author_facet Korn, Maria das Graças Andrade
Ferreira, Adriana Costa
Costa, Antonio Celso Spinola
author_role author
author2 Ferreira, Adriana Costa
Costa, Antonio Celso Spinola
author2_role author
author
dc.contributor.author.fl_str_mv Korn, Maria das Graças Andrade
Ferreira, Adriana Costa
Costa, Antonio Celso Spinola
Korn, Maria das Graças Andrade
Ferreira, Adriana Costa
Costa, Antonio Celso Spinola
dc.subject.por.fl_str_mv Preconcentration
Cadmium
PAR
topic Preconcentration
Cadmium
PAR
description p. 77– 83
publishDate 2004
dc.date.issued.fl_str_mv 2004
dc.date.accessioned.fl_str_mv 2012-01-06T23:51:16Z
dc.date.available.fl_str_mv 2012-01-06T23:51:16Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/5057
dc.identifier.issn.none.fl_str_mv 1095-9149
dc.identifier.number.pt_BR.fl_str_mv v. 78.
identifier_str_mv 1095-9149
v. 78.
url http://www.repositorio.ufba.br/ri/handle/ri/5057
dc.language.iso.fl_str_mv eng
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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