Abstract − Analytical Sciences, 24(2), 273 (2008).
Optimization of Headspace Solid-Phase Microextraction for the Determination of Pesticide Residues in Vegetables and Fruits
Meekin CHAI,* Guanhuat TAN,** and Asha LAL**
*Department of Science and Mathematics, College of Engineering, Universiti Tenaga, Nasional Km 7, Jalan Kajang-Puchong, 43009 Kajang, Selangor, Malaysia
**Department of Chemistry, Faculty of Science, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
**Department of Chemistry, Faculty of Science, Universiti Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
A headspace solid-phase microextraction method has been developed for the determination of 8 pesticides in vegetables and fruits by using gas chromatography with an electron capture detector. Two types of fibers (polyacrylate, 85 µm and polydimethylsiloxane, 100 µm) have been assayed and compared. The main factors: extraction and desorption parameters, ionic strength, and the effects of dilution and organic solvents, were studied and optimized. The optimized procedures resulted in more than 80% recovery for all the investigated vegetable and fruit samples with RSD values below 10%.
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