Abstract
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 μm of polydimethylsiloxane (PDMS) and 85 μm 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 °C) the limits of detection (LODs) were in the range of 0.015-0.13 μg 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.
Original language | English |
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Number of pages | 10 |
Journal | Talanta |
Volume | 107 |
Early online date | 7 Jan 2013 |
DOIs | |
Publication status | Published - 30 Mar 2013 |
Externally published | Yes |
Keywords
- Multi-residue method
- Direct-immersion solid-phase microextraction (DI-SPME)
- GC–MS
- Pesticides
- Water samples
ASJC Scopus subject areas
- Analytical Chemistry