Potential of a simple mechanical extraction system for the rapid extraction of pesticides from foodstuffs. Application to the determination of organochlorine pesticides in lettuce.
The efficiency of a simple mechanical extraction system as applied in veterinary drug analysis has been tested in the field of pesticide residue analysis. As a first application, the system was used for the extraction of organochlorine pesticides from vegetables. The convenience of this simple extraction system consists of performing mechanical extraction in disposable polyethylene-based extraction bags, reducing considerably manual operation and cross-contamination. For the tested compounds and matrix (lettuce), recoveries of the 10 organochlorine pesticides performed at two spiking levels (n = 4 each level and compound) ranging between 0.06 and 3.3 mg/kg were between 60 and 80%, with most standard deviations <5%. The extraction method appeared to be simple and fast with a great potential for the analysis of many pesticide-matrix combinations.
Denloye
S A
SA
Laboratory of Organic-Analytical Chemistry, National Institute of Public Health and the Environment (RIVM), P.O. Box 1, NL-3720 BA Bilthoven, The Netherlands.
van der Hoff
G R
GR
Hogendoorn
E A
EA
Baumann
R A
RA
D002849:Chromatography, Gas; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D018545:Lactuca / Q000737:chemistry*
D006843:Hydrocarbons, Chlorinated; D007306:Insecticides