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Title: Optimisation of solid-phase microextraction coupled to HPLC-UV for the determination of organochlorine pesticides and their metabolites in environmental liquid samples
Authors: Torres Padrón, M. E. 
Sosa Ferrera, Z. 
Santana Rodríguez, J. J. 
UNESCO Clasification: 2301 química analítica
2391 Química ambiental
Keywords: Solid-phase microextraction
Organochlorine pesticides
High-performance liquid chromatography
Water analysis
Issue Date: 2006
Publisher: 1618-2642
Journal: Analytical and Bioanalytical Chemistry 
Abstract: A solid-phase microextraction (SPME) procedure using two commercial fibers coupled with high-performance liquid chromatography (HPLC) is presented for the extraction and determination of organochlorine pesticides in water samples. We have evaluated the extraction efficiency of this kind of compound using two different fibers: 60-μm polydimethylsiloxane–divinylbenzene (PDMS-DVB) and Carbowax/TPR-100 (CW/TPR). Parameters involved in the extraction and desorption procedures (e.g. extraction time, ionic strength, extraction temperature, desorption and soaking time) were studied and optimized to achieve the maximum efficiency. Results indicate that both PDMS-DVB and CW/TPR fibers are suitable for the extraction of this type of compound, and a simple calibration curve method based on simple aqueous standards can be used. All the correlation coefficients were better than 0.9950, and the RSDs ranged from 7% to 13% for 60-μm PDMS-DVB fiber and from 3% to 10% for CW/TPR fiber. Optimized procedures were applied to the determination of a mixture of six organochlorine pesticides in environmental liquid samples (sea, sewage and ground waters), employing HPLC with UV-diode array detector.
ISSN: 1618-2642
DOI: 10.1007/s00216-006-0626-8
Source: Analytical and Bioanalytical Chemistry [ISSN 1618-2642], v. 386, p. 332-340
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