Journal
TALANTA
Volume 107, Issue -, Pages 1-10Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2012.12.052
Keywords
Multi-residue method; Direct-immersion solid-phase microextraction (DI-SPME); GC-MS; Pesticides; Water samples
Categories
Funding
- National Science Centre in Poland [DEC-2011/01/N/ST4/01977]
- European Union
- project: The development of interdisciplinary doctoral studies at the Gdansk University of Technology in modern technologies
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A simple and solvent-free multi-residue method has been optimized to determine 16 currently used pesticides from different chemical groups in aqueous samples. The extraction of analytes was carried out with direct immersion solid-phase microextraction (DI-SPME) and for the identification and quantitative determination gas chromatography coupled with mass spectrometry (GC-MS) was applied. Two commonly used adsorbent coatings have been applied and compared: 100 gm of polydimethylsiloxane (PDMS) and 85 mu m of polyacrylate (PA). The method development parameters of DI-SPME, analyte desorption and GC-MS analysis have been outlined along with the final experimental conditions. When the optimum extraction conditions were applied (extraction time 60 min, 10% (w/v) NaCl solution, 45 degrees C) the limits of detection (LODs) were in the range of 0.015-0.13 mu g L-1 and the relative standard deviations (RSDs) were between 1.9 and 9.6%. The developed analytical method was successfully applied to the analysis of natural water samples from the following sources: river, sea, canal and rain. (C) 2013 Elsevier B.V. All rights reserved.
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