Table B18. Concentrations (ng/g [ppb])
of PCB congeners found in NIST mussel tissue V (QA93TIS5)
PCB Analyte
Wet Weight Basis
Dry Weight Basis
Measured
Consensusa
Measured
Consensus
n
Mean
Std. Dev.
Value
Std. Dev.
z-Scoreb
n
Mean
Std. Dev.
Value
Std. Dev.
z-Scoreb
BZ #8
8
0.867
0.462
0.623
0.253
1
8
7.42
3.98
5.72
2.32
0.7
BZ #18
8
1.88
0.203
3.35
0.88
-1.7
8
16.1
1.79
30.7
8.1
-1.8
BZ #28
8
8.05
0.633
7.17
2.69
0.3
8
68.9
5.86
65.8
24.7
0.1
BZ #52
8
7.51
0.653
11.3
4.03
-0.9
8
64.3
5.81
104
37
-1.1
BZ #44
8
5.12
0.42
6.74
2.98
-0.5
8
43.8
3.8
61.8
27.3
-0.7
BZ #66
8
14.6
1.52
11.2
3.4
1
8
125
13.8
103
31
0.7
BZ #101
8
10.8
0.999
14.1
4.8
-0.7
8
92.1
9.16
129
44
-0.8
BZ #118
8
9.95
1.19
14.5
3.6
-1.3
8
85.2
10.8
133
33
-1.4
BZ #153
8
12.4
1.87
16
4.1
-0.9
8
106
16.8
147
38
-1.1
BZ #105
8
5.28
0.538
6.06
2.02
-0.4
8
45.2
4.71
55.6
18.5
-0.6
BZ #138
8
11.1
1.28
16
3.9
-1.2
8
95.3
11.5
147
36
-1.4
BZ #187
8
2.95
0.251
3.51
0.97
-0.6
8
25.2
2.29
32.2
8.9
-0.8
BZ #128
8
1.62
0.177
2.37
0.69
-1.1
8
13.9
1.6
21.7
6.3
-1.2
BZ #180
8
2.75
0.478
1.44
0.36
3.6
8
23.6
4.29
13.2
3.3
3.1
BZ #170
8
0.81
0.117
0.479
0.254
1.3
8
6.93
1.04
4.39
2.33
1.1
BZ #195
8
0.35
0.064
0.074
0.041
6.7
8
3
0.572
0.68
0.38
6.1
BZ #206
8
0.256c
0.273
0.057
0.044
4.6
8
2.20c
2.35
0.52
0.4
4.2
BZ #209
8
0.224
0.146
0.119
0.15
0.7
8
1.92
1.27
1.09
1.38
0.6
aConsensus values from 1993
NIST/NOAA/NS&T/EPA EMAP intercomparison exercise (NIST 1993). bz-score = (measured mean - consensus
value) / consensus standard deviation. cIncludes two values (-0.03 and -0.08
ppb, wet weight) which were treated as zero.