with some modifications. Soil (1 g)was spikedwith 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
with some modifications.Soil (1 g)was spikedwith 100 μL of the surrogate andmixed withanhydrous Na2SO4. A 50:50 (V/V)mixture of hexane and acetone(10 mL) was added, and the mixture was sonicated for 6 minusing an ultrasonic cleaner