Liquid-liquid extraction of benzo(a)pyrene was conducted from 1.5 L of an aqueous sample using a nonpolar organic solvent for the extraction. The distribution constant of the analyte for the used organic/aqueous phase system was 485. A total of 99.91 mg of the analyte was extracted in two consecutive extractions using 100 mL of the organic solvent in each step. This was the concentration of benzolalpyrene in the original aqueous sample:

66.67 ug/mL
O 100 ug/mL
O 114.56 kg/mL
O None of the above