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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
19/05/2016 |
Data da última atualização: |
06/09/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
OKUMURA, F.; AMARAL, R. B.; ORESTES, E.; SILVA, A. B. F.; MAZO, L. H. |
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. |
Título: |
Electrochemical and quantum chemical investigations of the insecticide fipronil. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 27, n. 5, p. 925-932, 2016. |
DOI: |
10.5935/0103-5053.20150347 |
Idioma: |
Português |
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. |
Thesagro: |
Química. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143142/1/Eletrochemical-quantum.pdf
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Marc: |
LEADER 01498naa a2200193 a 4500 001 2045321 005 2016-09-06 008 2016 bl uuuu u00u1 u #d 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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Embrapa Milho e Sorgo (CNPMS) |
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