was spiked with 100 μL of the surrogate andmixed with anhydrous Na2SO4. A 50:50 (V/V) mixture of hexane and acetone (10 mL) was added, and the mixture was sonicated for 6 min using an ultrasonic cleaner (Model 2510-DTH; Branson, CT, USA). Finally, the extract was filtered through 3-cm of glass wool.