Table 4.

The effect of washing cartridges after extraction step

Compound	RT (min)	Exp. conc.	Conc. (μg L−1)				% Recovery
			0 mL	5 mL	10 mL	15 mL	0 mL	5 mL	10 mL	15 mL
t-BP	3.202	0.400	0.33	0.35	0.31	0.31	82.50	87.50	77.50	77.50
n-BP	3.494	0.400	0.36	0.36	0.33	0.33	90.00	90.00	82.50	82.50
HXP	4.278	0.400	0.36	0.36	0.4	0.35	90.00	90.00	100.00	87.50
t-OP	4.481	0.400	0.39	0.38	0.4	0.35	97.50	95.00	100.00	87.50
PBB-1	4.776	0.400	0.21	0.07	0.09	0.07	52.50	17.50	22.50	17.50
HPP	4.824	0.400	0.33	0.34	0.35	0.3	82.50	85.00	87.50	75.00
OP	5.644	0.400	0.33	0.35	0.35	0.31	82.50	87.50	87.50	77.50
PBB-10	6.267	0.400	0.53	0.3	0.51	0.36	132.50	75.00	127.50	90.00
NP	6.423	0.400	0.25	0.23	0.27	0.23	62.50	57.50	67.50	57.50
OPE	7.177	0.400	0.53	0.49	0.54	0.44	132.50	122.50	135.00	110.00
OPPE	8.858	1.600	1.72	1.56	1.85	1.57	107.50	97.50	115.63	98.13
PBB-18	9.645	0.400	0.34	0.27	0.34	0.3	85.00	67.50	85.00	75.00
PBB-49	15.802	0.400	0.24	0.03	0.04	0.03	60.00	7.50	10.00	7.50
di-NPE2	14.636	1.600	2.22	2.06	2.09	1.76	138.75	128.75	130.63	110.00
di-NPE1	14.802	1.600	2.09	2.26	3.16	2.25	130.63	141.25	197.50	140.63
mono-NPE	15.190	1.600	2.61	2.7	2.64	1.97	163.13	168.75	165.00	123.13
NPPE1	19.629	1.600	2.85	3.56	3.65	4.32	178.13	222.50	228.13	270.00
TBBPA	20.848	1.600	0.76	0.79	0.52	0.35	47.50	49.38	32.50	21.88
NPPE2	20.982	1.600	1.95	0.65	0.58	0.85	121.88	40.63	36.25	53.13
HBCD	21.541	0.800	0.58	0.22	0.3	0.41	72.50	27.50	37.50	51.25

RT retention time