Development of a Supercritical Fluid Extraction method for simultaneous determination of organophosphorus, organohalogen, organonitrogen and pyretroids pesticides in fruit and vegetables and its comparison with a conventional method by GC-ECD and GC-MS

Journal of the Brazilian Chemical Society

Sandra Regina Rissato²  Mário Sérgio Galhiane²  Antonio G. De Souza¹  Bernhard M. Apon¹ 

[1] ,Universidade Estadual Paulista Departamento de Química Bauru SP ,Brazil

关键词: pesticides multiresidue analysis;    supercritical fluid extraction;    fruits;    vegetables;   

DOI  :  10.1590/S0103-50532005000600022

来源: SciELO

【 摘 要 】

The aim of this paper was to apply a multiresidue method using Supercritical Fluid Extraction (SFE) and capillary gas chromatography with electron capture and mass spectrometry detections in the analysis of the levels of pesticide residues in fruits and vegetables. Single laboratory validation of both solid-liquid and supercritical fluid extraction methods was carried out for 32 compounds selected from four pesticide classes (organochlorine, organonitrogen, organophosphorus and pyretroid) in blank and fortified samples of fresh lettuce, potato, apple and tomato. Recoveries for the majority of pesticides from fortified samples at fortification level of 0.04-0.10 mg kg-1 ranged 74-96% for both methods and confirmation of pesticide identity was performed by gas-chromatography-mass spectrometry in a selected-ion monitoring mode. Both methods showed good limits of detection (less 0.01 mg kg-1, depending on the pesticide and matrix) and the SFE method minimized environmental concerns, time, and laboratory work.

【 授权许可】

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