TM 157 Table B19

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Table B19. Instrumental detection limit (IDL) and estimated method detection limit (EMDL) for pesticide analytes
	Hexa- chloro- benzene	Lin- dane	Hepta- chlor	Aldrin	Octa- chloro- styrene	Hepta- chlor- epoxide	Oxy- chlor- dane	o,p'- DDE	- chlor- dane	trans- nona- chlor	Dieldrin	p,p'- DDE	o,p'- DDD	Endrin	p,p'- DDD	o,p'- DDT	p,p'- DDT	Photo- mirex	Mirex
Concentration of Solvent Spiked at Low Levels (ng/L)
Replicate 1	0.047	0.045	0.046	0.043	0.044	0.044	0.045	0.044	0.043	0.043	0.043	0.041	0.043	0.045	0.043	0.043	0.044	0.044	0.044
Replicate 2	0.045	0.044	0.045	0.042	0.043	0.045	0.046	0.044	0.043	0.042	0.042	0.041	0.042	0.043	0.042	0.043	0.042	0.043	0.044
Replicate 3	0.045	0.044	0.045	0.044	0.045	0.044	0.046	0.045	0.044	0.044	0.043	0.042	0.043	0.041	0.043	0.045	0.043	0.045	0.045
Replicate 4	0.044	0.044	0.046	0.044	0.043	0.048	0.051	0.045	0.044	0.044	0.044	0.043	0.044	0.043	0.044	0.046	0.044	0.045	0.045
Replicate 5	0.044	0.043	0.044	0.043	0.044	0.044	0.045	0.044	0.044	0.044	0.044	0.042	0.043	0.044	0.043	0.046	0.044	0.046	0.046
Replicate 6	0.042	0.040	0.041	0.040	0.043	0.042	0.044	0.043	0.042	0.042	0.042	0.040	0.041	0.043	0.041	0.044	0.042	0.044	0.044
Replicate 7	0.044	0.042	0.044	0.042	0.046	0.043	0.047	0.046	0.045	0.045	0.046	0.045	0.046	0.048	0.049	0.047	0.046	0.048	0.047
Mean	0.045	0.043	0.045	0.042	0.044	0.044	0.046	0.044	0.043	0.044	0.043	0.042	0.043	0.044	0.043	0.045	0.044	0.045	0.045
Std. dev.	0.001	0.002	0.002	0.002	0.001	0.002	0.002	0.001	0.001	0.001	0.001	0.002	0.001	0.002	0.002	0.001	0.001	0.001	0.001
RSD (%)	3.2	4.0	3.8	3.6	2.7	4.0	4.8	2.4	2.4	2.6	2.8	4.1	3.3	4.9	5.5	3.0	3.4	3.3	2.8

IDL^a	0.004	0.005	0.005	0.005	0.004	0.006	0.007	0.003	0.003	0.004	0.004	0.005	0.005	0.007	0.008	0.004	0.005	0.005	0.004
Corresponding Concentration in a Typical Tissue (ng/g wet weight)^b
Mean	1.11	5.40	5.57	5.31	5.49	5.53	5.76	5.54	5.44	5.44	5.43	5.27	5.39	5.48	5.43	5.62	5.48	5.63	5.64
Std. dev.	0.036	0.219	0.213	0.191	0.147	0.221	0.275	0.131	0.132	0.144	0.154	0.214	0.180	0.269	0.300	0.169	0.185	0.185	0.160
RSD (%)	3.2	4.0	3.8	3.6	2.7	4.0	4.8	2.4	2.4	2.6	2.8	4.1	3.3	4.9	5.5	3.0	3.4	3.3	2.8

EMDL^c	0.11	0.69	0.67	0.60	0.46	0.69	0.86	0.41	0.42	0.45	0.48	0.67	0.57	0.85	0.94	0.53	0.58	0.58	0.50
^aInstrumental detection limit is based on 3.143 times the standard deviation of seven replicate measurements. ^bAssumed 10g wet weight of muscle tissue, 50% recovery in the extraction and cleanup steps, 250 L final sample volume, and 1 L sample injection volume. ^cEstimated method detection limit is based on 3.143 times the standard deviation of a typical tissue.

Table B20

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(Modified Jun. 13 2008)