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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
19/05/2016 |
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Data da última atualização: |
06/09/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OKUMURA, F.; AMARAL, R. B.; ORESTES, E.; SILVA, A. B. F.; MAZO, L. H. |
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Afiliação: |
FABIANO OKUMURA, CNPMS; Raquel B. Amaral, Universidade de São Paulo; Ednilsom Orestes, Universidade Federal Fluminense; Albérico B. F. Silva, Universidade de São Paulo; Luiz Henrique Mazo, Universidade de São Paulo. |
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Título: |
Electrochemical and quantum chemical investigations of the insecticide fipronil. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 27, n. 5, p. 925-932, 2016. |
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DOI: |
10.5935/0103-5053.20150347 |
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Idioma: |
Português |
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Conteúdo: |
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 ?g 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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Thesagro: |
Química. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143142/1/Eletrochemical-quantum.pdf
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Marc: |
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024 7 $a10.5935/0103-5053.20150347$2DOI
100 1 $aOKUMURA, F.
245 $aElectrochemical and quantum chemical investigations of the insecticide fipronil.$h[electronic resource]
260 $c2016
520 $aThis 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 ?g 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.
650 $aQuímica
700 1 $aAMARAL, R. B.
700 1 $aORESTES, E.
700 1 $aSILVA, A. B. F.
700 1 $aMAZO, L. H.
773 $tJournal of the Brazilian Chemical Society$gv. 27, n. 5, p. 925-932, 2016.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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