Data/hora: 06/06/2024 14:02:19

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 19/05/2016
Data da última atualização: | 06/09/2016
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: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/143142/1/Eletrochemical-quantum.pdf
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (27108-1) - UPC - AP - DD -  -  -  - DIS