Limit of detection and limit of quantification development procedures for organochlorine pesticides analysis in water and sediment matrices

Table 5 **LOD and LOQ in sediment* (ng/g)**

Component	Average	SD	LOD = SD × T ^a	LOQ = 10*SD
α-HCH	0.0048	0.0003	0.001	0.003
γ –HCH	0.0053	0.0005	0.002	0.005
β-HCH	0.0052	0.0017	0.005	0.017
δ-HCH	0.005	0.0006	0.002	0.006
4,4'-DDE	0.0059	0.0006	0.002	0.006
4,4'-DDD	0.0046	0.0007	0.002	0.007
4,4'-DDT	0.0049	0.0003	0.001	0.003
Heptachlor	0.0066	0.0003	0.001	0.003
Heptachlor epoxide	0.0041	0.0004	0.001	0.004
Endosulfan I	0.0063	0.0003	0.001	0.003
Endosulfan II	0.0054	0.0003	0.001	0.003
Endosulfan sulfate	0.0044	0.0004	0.001	0.004
Aldrin	0.0054	0.0003	0.001	0.003
Dieldrin	0.0063	0.0003	0.001	0.003
Endrin	0.0045	0.0003	0.001	0.003
Endrin aldehyde	0.0051	0.0003	0.001	0.003
Methoxychlor	0.0046	0.0004	0.001	0.004
Endrin ketone	0.0055	0.0004	0.001	0.004
Max			0.005	0.017
Min			0.001	0.003
Average			0.001	0.005
SD			0.001	0.003
%CV			68	71

*Based on LFB: 1 mL mix of standard with 0.060 ppm into 10 g of sediment is equal to 0.006 mg/g, ^aT-value = 3.14 for 7 replicates.

ISSN: 2661-801X