Table 2.

Final concentrations of test chemicals in the obtained soil sample

Compound	Initial concentration (mg kg−1)	Final concentration (mg kg−1)	Recoveries (%)
Phenanthrene	10	6.70	67.00
	100	78.00	78.00
	250	241.00	96.40
	500	494.50	98.90
1,7-Phenanthroline	10	4.90	49.00
	100	59.30	59.30
	250	238.00	95.20
	500	523.60	104.70
Benzo[h]quinoline	10	7.00	70.00
	100	59.20	59.20
	250	227.10	90.80
	500	504.50	100.90
4,7-Phenanthroline	10	7.80	78.00
	100	91.90	91.90
	250	235.80	94.30
	500	408.60	81.70