Screening of By-Products of Esfenvalerate in Aqueous Medium Using SBSE Probe Desorption GC-IT-MS Technique

Autor(es)

Colombo, Renata ^{[1, 2]} ; Ferreira, Tanare C. R. ^[1] ; Yariwake, Janete H. ^[1] ; Lanza, Marcos R. V. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, BR-03828000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 26, n. 9, p. 1831-1837, SEP 2015.
• Citações Web of Science: 0

Resumo

The pyrethroids, their metabolites and by-products have been recognized as toxic to environment and human health. Despite several studies about esfenvalerate toxicity and its detection in water and sediments, information about its degradation products is still scanty. In this work, esfenvalerate degradation products were obtained by chemical oxidation with hydrogen peroxide and their structure was elucidated using a procedure known as stir bar sorptive extraction (SBSE) probe desorption gas chromatography-ion trap mass spectrometry (GC-IT-MS) analysis. This procedure consists of the thermal desorption of analytes extracted from a SBSE stir bar introduced by a probe into a gas chromatograph (GC) coupled to an ion trap mass spectrometry (IT-MS) system. Based on IT-MS data, a degradation pathway of esfenvalerate is proposed with ten products of chemical oxidation of esfenvalerate that are fully identified. Among these compounds, 3-phenoxybenzoic acid and 3-phenoxybenzaldehyde were detected, reported as being environmental metabolites of some pyrethroids, with endocrine-disrupting activity. (AU)

• 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: 10/05711-4 - Aplicações da SBSE (SBSE/LC, SBSE/GC) ao estudo químico-analítico dos frutos de Passiflora alata e de P. edulis (maracujá), com ênfase para substâncias naturais potencialmente tóxicas
• Beneficiário: Janete Harumi Yariwake
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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