Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP

Detalhes bibliográficos
Autor(a) principal: Costa, Antonio Celso Spinola
Data de Publicação: 1998
Outros Autores: Teixeira, Leonardo Sena Gomes, Jaeger, Helena Valli, 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/8263
Resumo: Texto completo: acesso restrito. p.41-45
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spelling Costa, Antonio Celso SpinolaTeixeira, Leonardo Sena GomesJaeger, Helena ValliFerreira, Sergio Luis CostaCosta, Antonio Celso SpinolaTeixeira, Leonardo Sena GomesJaeger, Helena ValliFerreira, Sergio Luis Costa2013-01-30T16:34:12Z19980026-3672http://www.repositorio.ufba.br/ri/handle/ri/8263v. 130, n. 1-2Texto completo: acesso restrito. p.41-45In the present paper, a simple and sensitive method is proposed for vanadium(IV) determination in the presence of vanadium(V). This is based on the oxidation of vanadium(IV) present in the sample to vanadium(V) by addition of iron(III) cation, followed by a complexation reaction of iron(II) with the spectrophotometric reagent 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP). The iron(II) reacts with Br-PADAP immediately, forming a stable complex with a large molar absorptivity. The vanadium(IV) determination is possible, with a calibration sensitivity of 0.549 μg ml−1, for an analytical curve of 18.8 ng ml−1 to 2.40 μg ml−1, molar absorptivity of 2.80 × 104 1 mole−1 cm−1 and a detection limit of 5.5 ng ml−1. Selectivity was increased with the use of EDTA as a masking agent. The proposed method was applied for the vanadium(IV) determination in the presence of several amounts of vanadium(V). The results revealed that 200 μg of vanadium(V) do not interfere with determination of 5.00 μg of vanadium(IV). The precision and the accuracy obtained were satisfactory (R. S. D.<2%).Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-01-30T16:34:12Z No. of bitstreams: 1 Costa.pdf: 815241 bytes, checksum: b1b579e6813ffa68164f367a4d413b64 (MD5)Made available in DSpace on 2013-01-30T16:34:12Z (GMT). No. of bitstreams: 1 Costa.pdf: 815241 bytes, checksum: b1b579e6813ffa68164f367a4d413b64 (MD5) Previous issue date: 1998http://dx.doi.org/10.1007/BF01254589reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAvanadium determinationBr-PADAPspectrophotometrySpectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAPMicrochimica Actainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/8263/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52ORIGINALCosta.pdfCosta.pdfapplication/pdf815241https://repositorio.ufba.br/bitstream/ri/8263/1/Costa.pdfb1b579e6813ffa68164f367a4d413b64MD51TEXTCosta.pdf.txtCosta.pdf.txtExtracted texttext/plain18166https://repositorio.ufba.br/bitstream/ri/8263/3/Costa.pdf.txtf457f7619585de1b86dd080afd975365MD53ri/82632022-07-05 14:03:51.292oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:51Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
dc.title.alternative.pt_BR.fl_str_mv Microchimica Acta
title Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
spellingShingle Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
Costa, Antonio Celso Spinola
vanadium determination
Br-PADAP
spectrophotometry
title_short Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
title_full Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
title_fullStr Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
title_full_unstemmed Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
title_sort Spectrophotometric determination of vanadium(IV) in the presence of vanadium(V) using Br-PADAP
author Costa, Antonio Celso Spinola
author_facet Costa, Antonio Celso Spinola
Teixeira, Leonardo Sena Gomes
Jaeger, Helena Valli
Ferreira, Sergio Luis Costa
author_role author
author2 Teixeira, Leonardo Sena Gomes
Jaeger, Helena Valli
Ferreira, Sergio Luis Costa
author2_role author
author
author
dc.contributor.author.fl_str_mv Costa, Antonio Celso Spinola
Teixeira, Leonardo Sena Gomes
Jaeger, Helena Valli
Ferreira, Sergio Luis Costa
Costa, Antonio Celso Spinola
Teixeira, Leonardo Sena Gomes
Jaeger, Helena Valli
Ferreira, Sergio Luis Costa
dc.subject.por.fl_str_mv vanadium determination
Br-PADAP
spectrophotometry
topic vanadium determination
Br-PADAP
spectrophotometry
description Texto completo: acesso restrito. p.41-45
publishDate 1998
dc.date.issued.fl_str_mv 1998
dc.date.accessioned.fl_str_mv 2013-01-30T16:34:12Z
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/8263
dc.identifier.issn.none.fl_str_mv 0026-3672
dc.identifier.number.pt_BR.fl_str_mv v. 130, n. 1-2
identifier_str_mv 0026-3672
v. 130, n. 1-2
url http://www.repositorio.ufba.br/ri/handle/ri/8263
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/10.1007/BF01254589
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)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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