Abstract
In this study, the solid-phase extraction/quick, easy, cheap, effective, rugged and safe (SPE/QuEChERS) technique was adapted to develop a simple sample treatment for multi-residue pesticide analysis of edible oils. The proposed method is based on liquid–liquid partitioning with acetonitrile followed by dispersive solid phase extraction using zirconia-coated silica particles for extract purification. To evaluate the described method, 21 pesticides belonging to different chemical classes were analysed using high performance liquid chromatography with diode-array detection (HPLC–DAD). For validation purposes, recovery studies were performed at 75ngg−1, 125ngg−1, 250ngg−1, 500ngg−1 and 1000ngg−1 levels. Recoveries were over the range of 50–130% for most of the analytes, with relative standard deviations less than 15% being observed. HPLC–DAD provided suitable linearity, precision and accuracy. The validated method was successfully applied to the analysis of edible oil samples selected from the market.
Published Version
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