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Table B9. Instrumental detection limit (IDL) and estimated method detection limit (EMDL) for PCB congeners
  
BZ#
8 18 28 52 66 101 77 118 153 105 138 126 187 128 180 170 195 206 209
Concentration of Solvent Spiked at Low Levels (ng/L)
Replicate 1 0.042 0.042 0.042 0.045 0.044 0.044 0.040 0.042 0.044 0.043 0.044 0.050 0.044 0.044 0.044 0.044 0.045 0.045 0.046
Replicate 2 0.043 0.043 0.041 0.044 0.044 0.044 0.039 0.042 0.043 0.041 0.043 0.051 0.043 0.042 0.042 0.042 0.044 0.044 0.044
Replicate 3 0.040 0.040 0.040 0.043 0.043 0.043 0.038 0.042 0.044 0.042 0.043 0.047 0.044 0.043 0.043 0.043 0.044 0.045 0.045
Replicate 4 0.041 0.041 0.041 0.043 0.044 0.044 0.040 0.042 0.044 0.042 0.043 0.049 0.044 0.043 0.043 0.043 0.044 0.044 0.045
Replicate 5 0.040 0.041 0.041 0.044 0.046 0.044 0.041 0.043 0.044 0.043 0.044 0.050 0.044 0.044 0.044 0.044 0.045 0.046 0.046
Replicate 6 0.039 0.040 0.040 0.043 0.044 0.044 0.041 0.043 0.044 0.043 0.044 0.048 0.044 0.043 0.044 0.044 0.045 0.045 0.045
Replicate 7 0.039 0.040 0.040 0.043 0.045 0.044 0.042 0.043 0.045 0.044 0.044 0.050 0.044 0.044 0.045 0.045 0.046 0.046 0.046
Mean 0.041 0.041 0.041 0.044 0.044 0.044 0.040 0.043 0.044 0.042 0.044 0.049 0.044 0.043 0.044 0.044 0.045 0.045 0.045
Std. dev. 0.002 0.001 0.001 0.001 0.001 0.000 0.001 0.001 0.000 0.001 0.000 0.001 0.000 0.001 0.001 0.001 0.001 0.001 0.001
RSD (%) 4.1 3.1 1.5 1.7 2.4 0.56 2.7 1.2 0.92 2.2 1.1 2.5 0.88 1.5 1.6 1.6 1.6 1.6 1.4


IDLa 0.005 0.004 0.002 0.002 0.003 0.001 0.003 0.002 0.001 0.003 0.002 0.004 0.001 0.002 0.002 0.002 0.002 0.002 0.002

Corresponding Concentration in a Typical Tissue (ng/g wet weight)b

Mean 1.02 1.03 1.02 1.09 1.11 1.09 1.01 1.06 1.10 1.06 1.09 1.24 1.10 1.08 1.09 1.09 1.12 1.12 1.13
Std. dev. 0.04 0.03 0.01 0.02 0.03 0.01 0.03 0.01 0.01 0.02 0.01 0.03 0.01 0.02 0.02 0.02 0.02 0.02 0.02
RSD (%) 4.1 3.1 1.5 1.7 2.4 0.6 2.7 1.2 0.92 2.2 1.1 2.5 0.88 1.5 1.6 1.6 1.6 1.6 1.4
 
EMDLc 0.13 0.10 0.047 0.059 0.083 0.019 0.087 0.042 0.032 0.072 0.039 0.097 0.031 0.051 0.055 0.055 0.055 0.057 0.048

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 B10

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 (Modified Jun. 13 2008)