Degradation Products of Lambda-Cyhalothrin in Aqueous Solution as Determined by SBSE-GC-IT-MS

Autor(es)

Colombo, Renata ^[1] ; Yariwake, Janete H. ^[2] ; Lanza, V, Marcos R.

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, BR-03828000 Sao Paulo, SP - Brazil

^[2] V, Univ Sao Paulo, Inst Quim Sao Carlos, Caixa Postal 780, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 29, n. 10, p. 2207-2212, OCT 2018.
• Citações Web of Science: 0

Resumo

Lambda-cyhalothrin is a widely employed pyrethroid insecticide and is potentially toxic to the environment and to human health. Several reports indicate the presence of this insecticide in water samples worldwide, but more data about its behavior in waters and its derivative products are required. This study shows the behavior of the pesticide lambda-cyhalothrin in aqueous solution at different pH and temperature that were simulated by using water contaminated with a toxic concentration of lambda-cyhalothrin and chemical oxidative process. Lambda-cyhalothrin and its derivative products were monitored employing stir bar sorptive extraction (SBSE), using liquid and thermal desorption, combined with gas chromatography coupled with ion trap mass spectrometry (GC-IT-MS) technology. GC-IT-MS enabled the proposal of the lambda-cyhalothrin chemical transformation pathway and the full identification of twelve derivative products. Among them, only 3-phenoxybenzaldehyde is reported as a degradation product of lambda-cyhalothrin, and this compound is an environmental pollutant with endocrine disrupting activity. (AU)

• Processo FAPESP: 07/04759-0 - ESTUDO DE ELETRODOS DE DIFUSÃO GASOSA (EDG) MODIFICADOS COM CATALISADORES ORGANOMETÁLICOS PARA A ELETROGERAÇÃO DE H2O2 in situ
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 07/08314-3 - Degradação de pesticidas organofosforados (clorpirifós, paration-metílico e profenofós) via processos eletroquímicos / processos oxidativos avançados
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/21886-7 - Desenvolvimento de métodos para identificação e quantificação de produtos naturais em extratos vegetais, com ênfase para o uso da SBSE (SBSE/LC-Fluorescência e SBSE/UHPLC-MS) para a investigação de novos alcalóides harmânicos do maracujá
• Beneficiário: Janete Harumi Yariwake
• Modalidade de apoio: Auxílio à Pesquisa - Regular