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Organochlorine pesticide residues in strawberries from integrated pest management and organic farming
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Orientador(es)
Resumo(s)
A rapid, specific, and sensitive method based on theQuick Easy Cheap Effective Rugged and Safe (QuEChERS) method
and a cleanup using dispersive solid-phase extraction with MgSO4, PSA, and C18 sorbents has been developed for the routine analysis of
14 pesticides in strawberries. The analyses were performed by three different analytical methodologies: gas chromatography (GC) with
electron capture detection (ECD), mass spectrometry (MS), and tandem mass spectrometry (MS/MS). The recoveries for all the
pesticides studied were from 46 to 128%, with relative standard deviation of <15% in the concentration range of 0.005-0.250 mg/kg.
The limit of detection (LOD) for all compoundsmetmaximumresidue limits (MRL) accepted in Portugal for organochlorine pesticides
(OCP). A survey study of strawberries produced in Portugal in the years 2009-2010 obtained from organic farming (OF) and
integrated pest management (IPM) was developed. Lindane and β-endosulfan were detected above the MRL in OF and IPM. Other
OCP (aldrin, o,p0-DDT and their metabolites, and methoxychlor) were found below the MRL. The OCP residues detected decreased
from 2009 to 2010. The QuEChERS method was successfully applied to the analysis of strawberry samples.
Descrição
Palavras-chave
Organochlorine pesticides Gas chromatography Mass spectrometry Tandem mass spectrometry Electron capture detection Strawberries Organic farming
Contexto Educativo
Citação
Editora
American Chemical Society Publications