The Soil samples were extracted using a soil-packed bulb and fortified at this step, before adding 25 g of pre-cleaned sand and 50 g of granular sodium sulfate. The sample mixture was manually shaken for 30 seconds, placed on a roller for 30 seconds, and then allowed to stand for 20 minutes to provide time for the sodium sulfate to adsorb any residual moisture from the soil. The sample mixture was then transferred to a 250ml bulb column and the sample jar was triple rinsed with small amounts of 5ml of hexane and transferred to the bulb column. The soil content was extracted with acetone:hexane (1:1 v/v, 250ml) and the eluate collected and concentrated to 100ml using a rotary evaporator. The soil extract was then subjected to additional cleanup.