Derivative spectrophotometric determination of nickel using Br-PADAP

Detalhes bibliográficos
Autor(a) principal: Ferreira, Sergio Luis Costa
Data de Publicação: 1996
Outros Autores: Costa, Antonio Celso Spinola, Jesus, Djane S. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/8445
Resumo: Texto completo: acesso restrito. p.1649–1656
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spelling Ferreira, Sergio Luis CostaCosta, Antonio Celso SpinolaJesus, Djane S. deFerreira, Sergio Luis CostaCosta, Antonio Celso SpinolaJesus, Djane S. de2013-02-15T14:19:37Z19960039-9140http://www.repositorio.ufba.br/ri/handle/ri/8445v. 43, n. 10Texto completo: acesso restrito. p.1649–1656A major problem with spectrophotometric methods for nickel is cobalt interference, because many of the reagents for nickel also react with cobalt. In this work, the interference of cobalt in the determination of nickel using 2-(5-bromo-2-pyridylaxo)-5-diethylaminophenol (Br-PADAP) was eliminated by the use of derivative spectrophotometry, using the zero-crossing method for evaluation of the derivative signal. Br-PADAP reacts with nickel(II) in the presence of Triton X-100 to form a red complex with absorption maxima at 530 and 562 nm. The reactions parameters and the conditions for the measurements of the first-derivative signal were studied and the results demonstrated that using the derivative technique, Br-PADAP can be used for nickel determination with a selectivity higher than that of ordinary spectrophotometry and with a limit of detection of 0.2 ng ml−1. The pH should be in the range 5.0–6.0 using an acetate buffer. The determination of nickel in the presence of cobalt was performed with conventional and derivative procedures, and the results demonstrated that only the derivative method should be used and, of the methods used for evaluation of the derivative signal, the zero-crossing method is the best. The proposed procedure was used for nickel determination in steels standards. The results demonstrated that the procedure has satisfactory accuracy and precision. Cobalt interference can be also eliminated by using dual-wave-length spectroscopy.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-02-15T14:19:37Z No. of bitstreams: 1 Ferreira.pdf: 551737 bytes, checksum: ccf6ce2ebed4d525c7dfb9b440873296 (MD5)Made available in DSpace on 2013-02-15T14:19:37Z (GMT). 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dc.title.pt_BR.fl_str_mv Derivative spectrophotometric determination of nickel using Br-PADAP
dc.title.alternative.pt_BR.fl_str_mv Talanta
title Derivative spectrophotometric determination of nickel using Br-PADAP
spellingShingle Derivative spectrophotometric determination of nickel using Br-PADAP
Ferreira, Sergio Luis Costa
Br-PADAP
Cobalt interference
Derivative spectrophotometry
Nickel
title_short Derivative spectrophotometric determination of nickel using Br-PADAP
title_full Derivative spectrophotometric determination of nickel using Br-PADAP
title_fullStr Derivative spectrophotometric determination of nickel using Br-PADAP
title_full_unstemmed Derivative spectrophotometric determination of nickel using Br-PADAP
title_sort Derivative spectrophotometric determination of nickel using Br-PADAP
author Ferreira, Sergio Luis Costa
author_facet Ferreira, Sergio Luis Costa
Costa, Antonio Celso Spinola
Jesus, Djane S. de
author_role author
author2 Costa, Antonio Celso Spinola
Jesus, Djane S. de
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira, Sergio Luis Costa
Costa, Antonio Celso Spinola
Jesus, Djane S. de
Ferreira, Sergio Luis Costa
Costa, Antonio Celso Spinola
Jesus, Djane S. de
dc.subject.por.fl_str_mv Br-PADAP
Cobalt interference
Derivative spectrophotometry
Nickel
topic Br-PADAP
Cobalt interference
Derivative spectrophotometry
Nickel
description Texto completo: acesso restrito. p.1649–1656
publishDate 1996
dc.date.issued.fl_str_mv 1996
dc.date.accessioned.fl_str_mv 2013-02-15T14:19:37Z
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/8445
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v. 43, n. 10
identifier_str_mv 0039-9140
v. 43, n. 10
url http://www.repositorio.ufba.br/ri/handle/ri/8445
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.ez10.periodicos.capes.gov.br/10.1016/0039-9140(96)01919-4
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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