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Title: Determination of organochlorine pesticides from agricultural soils using pressurized liquid extraction
Authors: Vega Moreno, Daura 
Sosa Ferrera, María Zoraida 
Santana Rodríguez, José Juan 
Pocurull Aixalà, E.
Borrull Ballarín, F.
UNESCO Clasification: 2301 química analítica
Keywords: Organochlorine pesticides
Pressurized liquid extraction
Gas chromatography-electron capture detection
Issue Date: 2007
Journal: Soil and Sediment Contamination 
Abstract: A method to determine thirteen organochlorine pesticides from soils samples has been developed using pressurized liquid extraction (PLE) and gas chromatography electron-capture detection. The variables optimized have been: type of solvent, number of cycles, temperature, time, flush volume and pressure. The optimal conditions have been hexane-acetone (1:1), 1 cycle, 50°C, 60% of flush volume and 1500 psi. The results obtained indicate that most of these compounds can be recovered quantitatively with RSDs lower than 10% and detection limits ranged between 0.3–200 ng· kg−1 for the pesticides studied. Under the optimized conditions, the proposed method has been applied to the analysis of agricultural soils. Aldrin and p, p′-DDT have been found in most of these samples at low μ g· kg−1 levels.
ISSN: 1532-0383
DOI: 10.1080/15320380701741263
Source: Soil & Sediment Contamination [ISSN 1532-0383], v. 17 (1), p. 1-11
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