Title
Miniaturized method based on matrix solid-phase dispersion for the rapid screening of 36 pesticides in agricultural food commodities Miniaturized method based on matrix solid-phase dispersion for the rapid screening of 36 pesticides in agricultural food commodities
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Publication type
article
Publication
New York, NY ,
Subject
Biology
Source (journal)
Analytical letters. - New York, NY
Volume/pages
43(2010) :7/8 , p. 1400-1410
ISSN
0003-2719
ISI
000277838400031
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Matrix solid-phase dispersion and gas chromatography-mass spectrometry were used for the rapid screening of 36 pesticides in agricultural products. Homogenized sample (0.5 g), C8-modified silica (0.5 g) and Na2SO4 (1 g) were mixed and transferred to a cartridge containing activated silica (0.5 g). Best recoveries (>60%) were found using dichloromethane-ethyl acetate (4:1) for elution. Analytical characteristics at spiking levels (10-100 μg/kg) were calculated for each pesticide. Matrix effects were studied by comparing the slopes of the matrix-matched calibration curves. Fruit and vegetable samples from South Africa complied with EU and South African current regulation, except for cypermethrin in green beans.
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