Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon

Detalhes bibliográficos
Autor(a) principal: Santos, Hilda Costa dos
Data de Publicação: 2001
Outros Autores: Korn, Maria das Graças Andrade, Ferreira, Sergio Luis Costa
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/7766
Resumo: Texto completo: acesso restrito. p. 79–84
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spelling Santos, Hilda Costa dosKorn, Maria das Graças AndradeFerreira, Sergio Luis CostaSantos, Hilda Costa dosKorn, Maria das Graças AndradeFerreira, Sergio Luis Costa2013-01-07T14:19:14Z20010003-2670http://www.repositorio.ufba.br/ri/handle/ri/7766v. 426, n. 1Texto completo: acesso restrito. p. 79–84The present paper proposes a procedure for separation, preconcentration and determination of trace amounts of molybdenum in geological samples by using atomic emission spectrometry with inductively coupled plasma (ICP-AES). It is based on the complexation of molybdenum(VI) ions by calmagite reagent and its sorption onto activated carbon. Parameters, such as calmagite amount, pH effect on the complexation and sorption, shaking time, mass of activated carbon, desorption of molybdenum from activated carbon, sample volume, effect of other ions and analytical features like precision, accuracy and others were studied. Results demonstrated that the molybdenum(VI) ions, within the pH range from 1.0 to 3.0, as calmagite complex, had been quantitatively sorbed (>90%) onto activated carbon. The shaking time required for sorption of the complex was 15 min by using 50 mg of activated carbon. A successfully desorption of molybdenum for its determination by ICP-AES was achieved by heating the loaded activated carbon with concentrated nitric acid at 120°C and treating the residue with 20% (v/v) nitric acid solution. The effect of some ions in the separation procedure was assessed and iron(III) should be reduced to iron(II) before the complexation, if present in fairly high amounts. This procedure was also efficient for elimination of spectral interference of aluminium in molybdenum determination by ICP-AES. The precision of the preconcentration method, calculated as the relative standard deviation by using 50.0 μg l−1 molybdenum solutions, was 2.21 and 2.89%, regarding repeatability and reproducibility, respectively. The limit of quantification and detection were 2.50 and 0.75 μg l−1, respectively, for a sample volume of 1000 ml. The achieved enrichment factor was 100. Achieved analytical results for (JR-1) Rhyolite, (RGM-1) Rhyolite, (SGR-1) Green river shale and (IPT-73) iron pure standard reference materials were in good agreement, between 92 and 103% of the certified values. The preconcentration procedure proposed was applied also to determine this element in seawater collected from Salvador City, Bahia, Brazil.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-01-07T14:19:14Z No. of bitstreams: 1 Santos.pdf: 55852 bytes, checksum: c7e89498e9463d724bef45e700ba8565 (MD5)Made available in DSpace on 2013-01-07T14:19:14Z (GMT). No. of bitstreams: 1 Santos.pdf: 55852 bytes, checksum: c7e89498e9463d724bef45e700ba8565 (MD5) Previous issue date: 2001http://dx.doi.org/10.1016/S0003-2670(00)01192-2reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAMolybdenumSpectral interferenceActivated carbonICP-AESEnrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbonAnalytica Chimica Actainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINALSantos.pdfSantos.pdfapplication/pdf55852https://repositorio.ufba.br/bitstream/ri/7766/1/Santos.pdfc7e89498e9463d724bef45e700ba8565MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/7766/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTSantos.pdf.txtSantos.pdf.txtExtracted texttext/plain20870https://repositorio.ufba.br/bitstream/ri/7766/3/Santos.pdf.txta4724261dfd41a25bda66873e262ae06MD53ri/77662022-07-05 14:03:20.865oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:20Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
dc.title.alternative.pt_BR.fl_str_mv Analytica Chimica Acta
title Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
spellingShingle Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
Santos, Hilda Costa dos
Molybdenum
Spectral interference
Activated carbon
ICP-AES
title_short Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
title_full Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
title_fullStr Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
title_full_unstemmed Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
title_sort Enrichment and determination of molybdenum in geological samples and seawater by ICP-AES using calmagite and activated carbon
author Santos, Hilda Costa dos
author_facet Santos, Hilda Costa dos
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
author_role author
author2 Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
author2_role author
author
dc.contributor.author.fl_str_mv Santos, Hilda Costa dos
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
Santos, Hilda Costa dos
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
dc.subject.por.fl_str_mv Molybdenum
Spectral interference
Activated carbon
ICP-AES
topic Molybdenum
Spectral interference
Activated carbon
ICP-AES
description Texto completo: acesso restrito. p. 79–84
publishDate 2001
dc.date.issued.fl_str_mv 2001
dc.date.accessioned.fl_str_mv 2013-01-07T14:19:14Z
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/7766
dc.identifier.issn.none.fl_str_mv 0003-2670
dc.identifier.number.pt_BR.fl_str_mv v. 426, n. 1
identifier_str_mv 0003-2670
v. 426, n. 1
url http://www.repositorio.ufba.br/ri/handle/ri/7766
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/S0003-2670(00)01192-2
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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