Journal
TALANTA
Volume 71, Issue 3, Pages 1345-1351Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2006.07.012
Keywords
organochlorine pesticides; vegetable samples; pressurized liquid extraction; microwave assisted extraction; solid-phase extraction
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A method to determine organochlorine pesticides in horticultural samples (lettuce, tomato, spinach, potato, turnip leaf and green bean) using pressurized liquid extraction (PLE) is described and compared with microwave assisted extraction (MAE). Significant parameters affecting PLE procedure such as temperature, static extraction time and extraction solvent were optimised and discussed. Clean-up of extracts was performed by solid phase extraction (SPE) using a carbon cartridge as adsorbent. Pesticides were determined by gas chromatography and electron capture detection (GC-ECD). Analytical recoveries obtained were ca. 100% and the relative standard deviations were lower than 15% for most of the studied pesticides with the proposed methods in each analysed matrix. (c) 2006 Elsevier B.V. All rights reserved.
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