Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices

Detalhes bibliográficos
Autor(a) principal: Ferreira, Sergio Luis Costa
Data de Publicação: 1994
Outros Autores: Nano, Rita M. W.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/12949
Resumo: Texto completo. Acesso restrito. p. 1937–1941
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spelling Ferreira, Sergio Luis CostaNano, Rita M. W.Ferreira, Sergio Luis CostaNano, Rita M. W.2013-09-16T19:18:48Z2013-09-16T19:18:48Z19940039-9140http://www.repositorio.ufba.br/ri/handle/ri/12949v. 41, n. 11Texto completo. Acesso restrito. p. 1937–1941The present work describes the use of 1-(2-thiazolylazo)-2-naphthol (TAN) as a spectrophotomeric reagent for iron determination. TAN reacts with iron(II) forming a brown complex with absorption maximum at 575 and 787 nm. The following parameters were studied: complex stability, pH effect, amount of the TAN, buffer selection, amount of acetate buffer, reductor effect, order of addition of reagents and adherence to Beer's Law. The results demonstrated that iron can be determined with TAN in a pH range of 4.0–6.2 with an apparent molar absorptivity of 1.83 × 104 1 . mol−1 . cm−1 (at 787 nm) and 1.41 × 104 1 . mol−1 . cm−1 (at 575 nm). Beer's Law is obeyed for at least 3.00 μg/ml. The TAN reacts with other cations, but at 787 nm only the iron(II)-TAN complex absorbs. So, iron can be determined selectively in the presence of several cations. A procedure based on the direct mixture of the sample and a chromogenic solution is proposed, where iron can be determined rapidly and easily. Such procedures were used for the determination of iron in several geological matrices. No significant differences were obtained for TAN method and certificate results.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-09-16T19:18:48Z No. of bitstreams: 1 666666666666666666.pdf: 541317 bytes, checksum: 20a12c48a400450dac4433840f9d0579 (MD5)Made available in DSpace on 2013-09-16T19:18:48Z (GMT). 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dc.title.pt_BR.fl_str_mv Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
dc.title.alternative.pt_BR.fl_str_mv Talanta
title Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
spellingShingle Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
Ferreira, Sergio Luis Costa
title_short Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
title_full Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
title_fullStr Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
title_full_unstemmed Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
title_sort Use of 1-(2-thiazolylazo) 2-naphthol in rapid determination of iron in geological matrices
author Ferreira, Sergio Luis Costa
author_facet Ferreira, Sergio Luis Costa
Nano, Rita M. W.
author_role author
author2 Nano, Rita M. W.
author2_role author
dc.contributor.author.fl_str_mv Ferreira, Sergio Luis Costa
Nano, Rita M. W.
Ferreira, Sergio Luis Costa
Nano, Rita M. W.
description Texto completo. Acesso restrito. p. 1937–1941
publishDate 1994
dc.date.issued.fl_str_mv 1994
dc.date.accessioned.fl_str_mv 2013-09-16T19:18:48Z
dc.date.available.fl_str_mv 2013-09-16T19:18:48Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/12949
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v. 41, n. 11
identifier_str_mv 0039-9140
v. 41, n. 11
url http://www.repositorio.ufba.br/ri/handle/ri/12949
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.publisher.none.fl_str_mv Talanta
publisher.none.fl_str_mv Talanta
dc.source.pt_BR.fl_str_mv http://www-sciencedirect-com.ez10.periodicos.capes.gov.br/science/article/pii/0039914094001529
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