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

Table 7

Intermediate precision assessed by the analysis of different sediments collected in the area of study. The number of sediment samples corresponds to those of samples with mass fraction above detection limit.

Compound	Number of sediment samples	(%)
o,p′-DDD	32	23
p,p′-DDD	32	36
o,p′-DDE	32	23
p,p′-DDE	31	24
o,p′-DDT	14	54
p,p′-DDT	10	63
Hexachlorobenzene	31	39
-HCH	32	31
-HCH	29	36
-HCH	27	25
Pentachlorobenzene	27	43
PCB-28	31	27
PCB-52	32	24
PCB-101	31	30
PCB-118	18	24
PCB-138	11	37
PCB-153	29	32
PCB-180	9	33