Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)

Detalhes bibliográficos
Autor(a) principal: Pereira, S. F. P.
Data de Publicação: 2008
Outros Autores: Ferreira, Sergio Luis Costa, Oliveira, G. R., Palheta, D. C., Barros, B. C.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/2832
Resumo: p.23-28
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spelling Pereira, S. F. P.Ferreira, Sergio Luis CostaOliveira, G. R.Palheta, D. C.Barros, B. C.Pereira, S. F. P.Ferreira, Sergio Luis CostaOliveira, G. R.Palheta, D. C.Barros, B. C.2011-09-22T19:28:37Z2011-09-22T19:28:37Z20080100-4670http://www.repositorio.ufba.br/ri/handle/ri/283233(3):23-28p.23-28Um novo método, simples e sensível para a determinação de arsênio em solo é proposto neste trabalho. Este método é baseado na redução de prata (I) e ferro (III) pela arsina seguida da reação de complexação do ferro (II) com o reagente espectrofotométrico 2-(5-bromo-2-piridilazo)-5-di-etilaminofenol (Br-PADAP). A determinação de arsênio apresentou uma sensitividade de Sandell de 3.1x10-4 cm-2, foi linear na faixa de 0.1 µg ml-1 to 2.0 µg ml-1 (r560 = 0.9995), apresentou uma absortividade molar de 2.45x105 l mol-1 cm-1 e um limite de detecção de 1.4 ng ml-1 (3s) estes dados foram obtidos para 10 ml de amostra. A seletividade foi melhorada com o uso de EDTA com agente mascarante. O método proposto foi aplicado na determinação do arsênio na presença de outros íons e em amostras de solo. Os resultados revelaram que antimônio (III), mercúrio (II), germânio (IV), platina (IV) interferem na análise em todas as proporções analisadas. As interferências podem ser facilmente removidas pelo uso do EDTA. A precisão e a exatidão deram resultados satisfatórios, com desvio padrão relativo abaixo de 5%. As recuperações de arsênio em solo variaram de 95,55 a 102,70% com uma média de 99,63%. Estes resultados demonstraram que o método proposto é aplicável para a análise do arsênio em diferentes amostras de solo.Submitted by Rigaud Andréa (andrearigaud16@yahoo.com.br) on 2011-09-22T19:28:37Z No. of bitstreams: 1 a04v33n3.pdf: 105518 bytes, checksum: 54d0e86b0fb79e4ec0b3c408081f48c2 (MD5)Made available in DSpace on 2011-09-22T19:28:37Z (GMT). No. of bitstreams: 1 a04v33n3.pdf: 105518 bytes, checksum: 54d0e86b0fb79e4ec0b3c408081f48c2 (MD5) Previous issue date: 2008São PauloDeterminação de arsênioBr-PADAPespectrofotometriasoloArsenic determinationspectrophotometrysoilSpectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)Eclética Químicainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleporreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAinfo:eu-repo/semantics/openAccessORIGINALa04v33n3.pdfa04v33n3.pdfapplication/pdf105518https://repositorio.ufba.br/bitstream/ri/2832/1/a04v33n3.pdf54d0e86b0fb79e4ec0b3c408081f48c2MD51LICENSElicense.txtlicense.txttext/plain1906https://repositorio.ufba.br/bitstream/ri/2832/2/license.txtef013368dd78aa879d50cce25ff2f710MD52TEXTa04v33n3.pdf.txta04v33n3.pdf.txtExtracted texttext/plain21898https://repositorio.ufba.br/bitstream/ri/2832/3/a04v33n3.pdf.txt517252416aa0ff19b48371da29a2598eMD53ri/28322022-07-05 14:03:34.619oai:repositorio.ufba.br:ri/2832TGljZW5zZSBncmFudGVkIGJ5IFJpZ2F1ZCBBbmRyw6lhIChhbmRyZWFyaWdhdWQxNkB5YWhvby5jb20uYnIpIG9uIDIwMTEtMDktMjJUMTk6Mjg6MzdaIChHTVQpOgoKVGVybW8gZGUgTGljZW7Dp2EsIG7Do28gZXhjbHVzaXZvLCBwYXJhIG8gZGVww7NzaXRvIG5vIApyZXBvc2l0w7NyaW8gSW5zdGl0dWNpb25hbCBkYSBVRkJBCgogICAgUGVsbyBwcm9jZXNzbyBkZSBzdWJtaXNzw6NvIGRlIGRvY3VtZW50b3MsIG8gYXV0b3Igb3Ugc2V1CnJlcHJlc2VudGFudGUgbGVnYWwsIGFvIGFjZWl0YXIgZXNzZSB0ZXJtbyBkZSBsaWNlbsOnYSwgY29uY2VkZSBhbwpSZXBvc2l0w7NyaW8gSW5zdGl0dWNpb25hbCBkYSBVbml2ZXJzaWRhZGUgRmVkZXJhbCBkYSBCYWhpYSBvIGRpcmVpdG8KZGUgbWFudGVyIHVtYSBjw7NwaWEgZW0gc2V1IHJlcG9zaXTDs3JpbyBjb20gYSBmaW5hbGlkYWRlLCBwcmltZWlyYSwgCmRlIHByZXNlcnZhw6fDo28uIEVzc2UgdGVybW8sIG7Do28gZXhjbHVzaXZvLCBtYW50w6ptIG9zIGRpcmVpdG9zIGRlIAphdXRvci9jb3B5cmlnaHQsIG1hcyBlbnRlbmRlIG8gZG9jdW1lbnRvIGNvbW8gcGFydGUgZG8gYWNlcnZvIGludGVsZWN0dWFsCiBkZXNzYSBVbml2ZXJzaWRhZGUuIAoKICAgIFBhcmEgb3MgZG9jdW1lbnRvcyBwdWJsaWNhZG9zIGNvbSByZXBhc3NlIGRlIGRpcmVpdG9zIGRlIApkaXN0cmlidWnDp8OjbywgZXNzZSB0ZXJtbyBkZSBsaWNlbsOnYSBlbnRlbmRlIHF1ZTogCgogICAgTWFudGVuZG8gb3PCoCBkaXJlaXRvcyBhdXRvcmFpcywgcmVwYXNzYWRvcyBhIHRlcmNlaXJvcywgZW0gY2FzbyAKZGUgcHVibGljYcOnw7VlcywgbyByZXBvc2l0w7NyaW8gcG9kZSByZXN0cmluZ2lyIG8gYWNlc3NvIGFvIHRleHRvIAppbnRlZ3JhbCwgbWFzIGxpYmVyYSBhcyBpbmZvcm1hw6fDtWVzIHNvYnJlIG8gZG9jdW1lbnRvIChNZXRhZGFkb3MgZGVzY3JpdGl2b3MpLgogRGVzdGEgZm9ybWEsIGF0ZW5kZW5kbyBhb3MgYW5zZWlvcyBkZXNzYSB1bml2ZXJzaWRhZGUgCmVtIG1hbnRlciBzdWEgcHJvZHXDp8OjbyBjaWVudMOtwq1maWNhIGNvbSBhcyByZXN0cmnDp8O1ZXMgaW1wb3N0YXMgcGVsb3MgCmVkaXRvcmVzIGRlIHBlcmnDs2RpY29zLiAKCiAgICBQYXJhIGFzIHB1YmxpY2HDp8O1ZXMgZW0gaW5pY2lhdGl2YXMgcXVlIHNlZ3VlbSBhIHBvbMOtwq10aWNhIGRlIApBY2Vzc28gQWJlcnRvLCBvcyBkZXDDs3NpdG9zIGNvbXB1bHPDs3Jpb3MgbmVzc2UgcmVwb3NpdMOzcmlvIG1hbnTDqm0gCm9zIGRpcmVpdG9zIGF1dG9yYWlzLCBtYXMgbWFudMOqbSBvIGFjZXNzbyBpcnJlc3RyaXRvIGFvIG1ldGFkYWRvcyAKZSB0ZXh0byBjb21wbGV0by4gQXNzaW0sIGEgYWNlaXRhw6fDo28gZGVzc2UgdGVybW8gbsOjbyBuZWNlc3NpdGEgZGUgCmNvbnNlbnRpbWVudG8gcG9yIHBhcnRlIGRlIGF1dG9yZXMvZGV0ZW50b3JlcyBkb3MgZGlyZWl0b3MsIHBvciAKZXN0YXJlbSBlbSBpbmljaWF0aXZhcyBkZSBhY2Vzc28gYWJlcnRvLgoKICAgIEVtIGFtYm9zIG8gY2FzbywgZXNzZSB0ZXJtbyBkZSBsaWNlbsOnYSwgcG9kZSBzZXIgYWNlaXRvIHBlbG8gCmF1dG9yLCBkZXRlbnRvcmVzIGRlIGRpcmVpdG9zIGUvb3UgdGVyY2Vpcm9zIGFtcGFyYWRvcyBwZWxhIAp1bml2ZXJzaWRhZGUuIERldmlkbyBhb3MgZGlmZXJlbnRlcyBwcm9jZXNzb3MgcGVsbyBxdWFsIGEgc3VibWlzc8OjbyAKcG9kZSBvY29ycmVyLCBvIHJlcG9zaXTDs3JpbyBwZXJtaXRlIGEgYWNlaXRhw6fDo28gZGEgbGljZW7Dp2EgcG9yIAp0ZXJjZWlyb3MsIHNvbWVudGUgbm9zIGNhc29zIGRlIGRvY3VtZW50b3MgcHJvZHV6aWRvcyBwb3IgaW50ZWdyYW50ZXMgCmRhIFVGQkEgZSBzdWJtZXRpZG9zIHBvciBwZXNzb2FzIGFtcGFyYWRhcyBwb3IgZXN0YSBpbnN0aXR1acOnw6NvCg==Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:34Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
dc.title.alternative.pt_BR.fl_str_mv Eclética Química
title Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
spellingShingle Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
Pereira, S. F. P.
Determinação de arsênio
Br-PADAP
espectrofotometria
solo
Arsenic determination
spectrophotometry
soil
title_short Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
title_full Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
title_fullStr Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
title_full_unstemmed Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
title_sort Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)
author Pereira, S. F. P.
author_facet Pereira, S. F. P.
Ferreira, Sergio Luis Costa
Oliveira, G. R.
Palheta, D. C.
Barros, B. C.
author_role author
author2 Ferreira, Sergio Luis Costa
Oliveira, G. R.
Palheta, D. C.
Barros, B. C.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Pereira, S. F. P.
Ferreira, Sergio Luis Costa
Oliveira, G. R.
Palheta, D. C.
Barros, B. C.
Pereira, S. F. P.
Ferreira, Sergio Luis Costa
Oliveira, G. R.
Palheta, D. C.
Barros, B. C.
dc.subject.por.fl_str_mv Determinação de arsênio
Br-PADAP
espectrofotometria
solo
Arsenic determination
spectrophotometry
soil
topic Determinação de arsênio
Br-PADAP
espectrofotometria
solo
Arsenic determination
spectrophotometry
soil
description p.23-28
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2011-09-22T19:28:37Z
dc.date.available.fl_str_mv 2011-09-22T19:28:37Z
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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dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/2832
dc.identifier.issn.none.fl_str_mv 0100-4670
dc.identifier.number.pt_BR.fl_str_mv 33(3):23-28
identifier_str_mv 0100-4670
33(3):23-28
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