[Determination of dichlorvos in water by microwave-assisted-headspace-liquid-phase microextraction coupled with high...

A novel method for the determination of dichlorvos in environmental water samples has been developed using microwave-assisted-headspace-liquid-phase microextraction (MAE-HS-LPME) coupled with high performance liquid chromatography (HPLC). The influences of extraction parameters in the sample matrix were investigated. Under optimized experimental conditions, the detection limit (S/N = 3), the quantification limit (S/N = 10) and the enrichment factor of the proposed method for the target analyte were 0.96 microg/L, 3.20 microg/L and 54, respectively. The recoveries of target analyte spiked in real water samples were 87.4%-103%. The extraction performance of MAE-HS-LPME to the target analyte was also compared with liquid-liquid extraction (LLE). The results indicated that the developed method is simple, rapid, efficient, solvent-saving, highly selective and widely applicable.