A method of combined microwave-assisted extraction (MAE) and purification using a vacuum manifold was studied on a rapid analysis of persistent organic pollutants (POPs) in soil. Three grams of sample was extracted with mixed solvents composed of 6 mL hexane, 2 mL eth-anol, and 2 mL water at 120 °C for 30 min. After extraction, the sample was directly applied to the purification process without the performance of concentration and solvent substitution procedures. As a result of a spiked test for POPs, the recoveries of all compounds were over 80%, and the reproducibility of the replicate analysis was within 8.4% of the relative standard deviations. We compared the quantitative determination of POPs in soil by our MAE method and by the conventional Soxhlet extraction method. The concentrations and reproducibility obtained by our MAE method corresponded to those obtained by the conventional method. The total time required for the pretreatment process from extraction to purification procedures was only 2 h.
All Science Journal Classification (ASJC) codes
- Analytical Chemistry