Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil

Detalhes bibliográficos
Autor(a) principal: Okumura,Fabiano
Data de Publicação: 2016
Outros Autores: Amaral,Raquel B., Orestes,Ednilsom, Silva,Albérico B. F., Mazo,Luiz Henrique
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500925
Resumo: This work describes an electrochemical and quantum chemical investigation of the fipronil insecticide. Cyclic voltammetry (CV) and square wave voltammetry (SWV) experiments were performed over a graphite-polyurethane (GPU) composite electrode. The fipronil molecule presents an one-electron irreversible oxidation reaction. Profiting the SWV signal a square wave stripping voltammetry (SWSV) procedure to determine the fipronil molecule in a 0.10 mol L-1 Britton-Robinson buffer solution, pH 8.0 was developed with accumulation potential and time of 0.50 V and 120 s, respectively. The limits of detection and quantification were 0.80 and 2.67 μg L-1, respectively. Recovery tests were performed in three natural waters samples with values ranging from 99.67 to 101.37%. Quantum chemical studies showed that the nitrogen atom of the pyrazole group is the most probable oxidation site of the fipronil molecule.
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spelling Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronilfipronilgraphite-polyurethanesquare wave voltammetrydensity-functional theoryThis work describes an electrochemical and quantum chemical investigation of the fipronil insecticide. Cyclic voltammetry (CV) and square wave voltammetry (SWV) experiments were performed over a graphite-polyurethane (GPU) composite electrode. The fipronil molecule presents an one-electron irreversible oxidation reaction. Profiting the SWV signal a square wave stripping voltammetry (SWSV) procedure to determine the fipronil molecule in a 0.10 mol L-1 Britton-Robinson buffer solution, pH 8.0 was developed with accumulation potential and time of 0.50 V and 120 s, respectively. The limits of detection and quantification were 0.80 and 2.67 μg L-1, respectively. Recovery tests were performed in three natural waters samples with values ranging from 99.67 to 101.37%. Quantum chemical studies showed that the nitrogen atom of the pyrazole group is the most probable oxidation site of the fipronil molecule.Sociedade Brasileira de Química2016-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500925Journal of the Brazilian Chemical Society v.27 n.5 2016reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20150347info:eu-repo/semantics/openAccessOkumura,FabianoAmaral,Raquel B.Orestes,EdnilsomSilva,Albérico B. F.Mazo,Luiz Henriqueeng2016-05-18T00:00:00Zoai:scielo:S0103-50532016000500925Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2016-05-18T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
title Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
spellingShingle Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
Okumura,Fabiano
fipronil
graphite-polyurethane
square wave voltammetry
density-functional theory
title_short Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
title_full Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
title_fullStr Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
title_full_unstemmed Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
title_sort Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
author Okumura,Fabiano
author_facet Okumura,Fabiano
Amaral,Raquel B.
Orestes,Ednilsom
Silva,Albérico B. F.
Mazo,Luiz Henrique
author_role author
author2 Amaral,Raquel B.
Orestes,Ednilsom
Silva,Albérico B. F.
Mazo,Luiz Henrique
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Okumura,Fabiano
Amaral,Raquel B.
Orestes,Ednilsom
Silva,Albérico B. F.
Mazo,Luiz Henrique
dc.subject.por.fl_str_mv fipronil
graphite-polyurethane
square wave voltammetry
density-functional theory
topic fipronil
graphite-polyurethane
square wave voltammetry
density-functional theory
description This work describes an electrochemical and quantum chemical investigation of the fipronil insecticide. Cyclic voltammetry (CV) and square wave voltammetry (SWV) experiments were performed over a graphite-polyurethane (GPU) composite electrode. The fipronil molecule presents an one-electron irreversible oxidation reaction. Profiting the SWV signal a square wave stripping voltammetry (SWSV) procedure to determine the fipronil molecule in a 0.10 mol L-1 Britton-Robinson buffer solution, pH 8.0 was developed with accumulation potential and time of 0.50 V and 120 s, respectively. The limits of detection and quantification were 0.80 and 2.67 μg L-1, respectively. Recovery tests were performed in three natural waters samples with values ranging from 99.67 to 101.37%. Quantum chemical studies showed that the nitrogen atom of the pyrazole group is the most probable oxidation site of the fipronil molecule.
publishDate 2016
dc.date.none.fl_str_mv 2016-05-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500925
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500925
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.5935/0103-5053.20150347
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.27 n.5 2016
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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