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Simultaneous determination of neonicotinoid insecticides in agricultural samples by solid-phase extraction cleanup and liquid chromatography equipped with diode-array detection.
Watanabe, Eiki; Baba, Koji; Eun, Heesoo.
Afiliação
  • Watanabe E; National Institute for Agro-Environmental Sciences, Kannondai 3-1-3, Tsukuba, Ibaraki 305-8604, Japan. eikiw@niaes.affrc.go.jp
J Agric Food Chem ; 55(10): 3798-804, 2007 May 16.
Article em En | MEDLINE | ID: mdl-17439140
Effective sample pretreatment procedures based on solid-phase extraction (SPE) for multiresidue determination of seven neonicotinoid insecticides in agricultural products were investigated. After extraction with acetone and concentration, the insecticides in aqueous sample extracts were transferred into organic solvent phases with a Chem Elut SPE cartridge. Finally, the eluate from the cartridge was cleaned up with a SPE cartridge packed with graphitized carbon black and aminopropyl silica gel, which showed a higher cleanup efficiency than the classical silica gel SPE cartridge. Seven insecticides were separated on a reversed-phase C18 column and a gradient system of methanol and phosphate solution based on high-performance liquid chromatography. The established multiresidue determination has been applied to several artificially spiked agricultural samples, with the result that the average recoveries were excellent, with the exception of nitenpyram. The limit of detection of the method ranged from 0.01 to 0.03 mg/kg for the insecticides.
Assuntos
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Base de dados: MEDLINE Assunto principal: Cromatografia Líquida de Alta Pressão / Produtos Agrícolas / Anabasina / Inseticidas Tipo de estudo: Diagnostic_studies Idioma: En Ano de publicação: 2007 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Assunto principal: Cromatografia Líquida de Alta Pressão / Produtos Agrícolas / Anabasina / Inseticidas Tipo de estudo: Diagnostic_studies Idioma: En Ano de publicação: 2007 Tipo de documento: Article