Document Detail

Evaluation of conventionally and organically produced vegetables for high lipophilic organochlorine pesticide (OCP) residues.
MedLine Citation:
PMID:  15621339     Owner:  NLM     Status:  MEDLINE    
The occurrence and distribution of highly hydrophobic organochlorine pesticide (OCP) in vegetables cultivated under organic and conventional conditions were evaluated. OCP residues in aerial and subterranean tissues of two varieties of lettuce and chard together with the soil where they grown were GC-ECD analyzed. SigmaDDTs>SigmaChlordane>SigmaHeptachlor>SigmaAldrins was the OCP distribution pattern in all samples. Conventional soils had higher OCP residues than organic one, even though levels were bellow 5 ng/g dry weight, indicative of low polluted agricultural environments. Vegetables accumulated OCP efficiently with residue levels 4x to 45x fold greater than those of soils. OCP tissue-dependent distribution was found to be upon the physicochemical characteristics of the pollutants (Koa and Kow). Lettuce showed a high variability in pesticide uptake regarding varieties and tillage practices. In spite of analyzed pesticides are banned or restricted, edible tissues of vegetables from both farms showed detectable residues of these compounds even though at levels below the allowed by the Codex Alimentarius. Thus, environmental conditions like presence or absence of trees, hedgerows or nearby to conventional farms influence on OCP occurrence and levels in vegetables organically grown.
Mariana Gonzalez; Karina S B Miglioranza; Julia E Aizpún de Moreno; Víctor J Moreno
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association     Volume:  43     ISSN:  0278-6915     ISO Abbreviation:  Food Chem. Toxicol.     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2004-12-28     Completed Date:  2005-03-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8207483     Medline TA:  Food Chem Toxicol     Country:  England    
Other Details:
Languages:  eng     Pagination:  261-9     Citation Subset:  IM    
Laboratorio de Ecotoxicología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, 7600 Mar del Plata, Argentina.
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MeSH Terms
Agriculture / methods*
Consumer Product Safety
Food Contamination / analysis
Hydrocarbons, Chlorinated / analysis*
Insecticides / analysis*,  metabolism
Lettuce / chemistry
Pesticide Residues / analysis*
Soil Pollutants / analysis*,  metabolism
Vegetables / chemistry*
Reg. No./Substance:
0/Hydrocarbons, Chlorinated; 0/Insecticides; 0/Pesticide Residues; 0/Soil Pollutants

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