Artículos de revistas
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
Fecha
2005-09-01Registro en:
Journal of the Brazilian Chemical Society, v. 16, n. 5, p. 1038-1047, 2005.
0103-5053
10.1590/S0103-50532005000600022
S0103-50532005000600022
WOS:000233012700022
2-s2.0-30744467420
2-s2.0-30744467420.pdf
2611597065632795
3612277056838097
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal da Paraíba (UFPB)
Chromapon Inc.
Institución
Resumen
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. ©2005 Sociedade Brasileira de Química.