CHEMICAL DEGRADATION OF ESFENVALERATE AND HPLC-UV-PAD DETECTION OF INTERMEDIATES AND BY-PRODUCTS
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
---|---|
Data(s) |
01/11/2013
01/11/2013
2012
|
Resumo |
The impact of pyretroids, their by-products and degradation products on humans and the environment is recognized as a serious problem. Despite several studies regarding esfenvalerate toxicity and its detection in water and sediments, there is still a lack of information about its degradation intermediates and by-products in water. In this work, an HPLC method was developed to follow up the degradation of esfenvalerate and to detect the intermediates and by-products formed during the chemical degradation process. The chemical degradation was performed using an esfenvalerate suspension and different concentrations of hydrogen peroxide, temperatures, and pH. The reaction was monitored for 24 hr, and during the kinetic experiments, samples were collected at several reaction times and analyzed by HPLC-UV-PAD. In the degradation process, eleven different compounds (intermediate and by-products) were detected, among them the metabolites 3-phenoxybenzoic acid and 3-phenoxybenzaldehyde. HPLC-UV-PAD proved to be a valuable analytical technique for the rapid and reliable separation and determination of esfenvalerate, its degradation intermediates, and by-products. FAPESP FAPESP [2007/08314-3, 2007/04759-0, 2010/05711-4] CNPq CNPq [150772/2010-6, 500200/2010-6] |
Identificador |
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES, PHILADELPHIA, v. 35, n. 8, supl. 1, Part 2, pp. 1081-1090, AUG, 2012 1082-6076 http://www.producao.usp.br/handle/BDPI/37709 10.1080/10826076.2011.615096 |
Idioma(s) |
eng |
Publicador |
TAYLOR & FRANCIS INC PHILADELPHIA |
Relação |
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES |
Direitos |
restrictedAccess Copyright TAYLOR & FRANCIS INC |
Palavras-Chave | #3-PHENOXYBENZALDEHYDE #3-PHENOXYBENZOIC ACID #CHEMICAL OXIDATION #ESFENVALERATE #HPLC-UV-PAD #PYRETHROID #PYRETHROID INSECTICIDES #LITTORAL ENCLOSURES #PHOTODEGRADATION #EXTRACTION #BIOCHEMICAL RESEARCH METHODS #CHEMISTRY, ANALYTICAL |
Tipo |
article original article publishedVersion |