Validating Analytical Protocols to Determine Selected Pesticides and PCBs Using Routine Samples

Table 2

Values of recovery and relative standard deviations (expressed in %) obtained from the analysis of two sediments spiked at two levels of concentration.

Compound	Spiked 50 ng		Spiked 200 ng		(%)	(%)
	Sediment 1 (%)	Sediment 2 (%)	Sediment 1 (%)	Sediment 2 (%)
p,p′-DDD	129 ± 5.7	104 ± 5.8	124 ± 2.9	82 ± 1.0	109	9.7	0.71
p,p′-DDE	103 ± 1.6	75 ± 1.2	92 ± 3.9	82 ± 5.7	88	7.3	1.62
p,p′-DDT	96 ± 1.3	26 ± 3.5	88 ± 1.6	15 ± 1.5	56	3.6	12
HCB	60 ± 18	122 ± 20.0	59 ± 7.0	100 ± 6.1	85	21.0	0.74
α-HCH	92 ± 8.8	85 ± 1.7	56 ± 5.2	87 ± 2.5	72	9.0	3.06
β-HCH	134 ± 6.3	126 ± 5.2	123 ± 6.0	126 ± 4.7	127	8.1	3.37
γ-HCH	71 ± 1.0	89 ± 5.3	67 ± 4.3	93 ± 1.0	80	6.5	3.10
PCB-28	108 ± 2.6	137 ± 6.0	99 ± 5.8	89 ± 16.0	108	4.9	1.64
PCB-52	112 ± 1.1	109 ± 2.9	101 ± 2.7	111 ± 7.5	108	15.0	0.54
PCB-101	120 ± 1.0	101 ± 3.3	112 ± 3.5	104 ± 4.3	109	12.0	0.77
PCB-118	113 ± 4.0	103 ± 3.6	118 ± 2.4	104 ± 1.6	110	10.2	0.93
PCB-138	120 ± 1.5	90 ± 4.6	114 ± 1.1	92 ± 1.1	104	11.9	0.35
PCB-153	120 ± 1.0	94 ± 3.7	113 ± 1.9	97 ± 1.5	106	8.4	0.71
PCB-180	129 ± 1.2	82 ± 8.3	123 ± 1.0	79 ± 1.1	103	7.1	0.48