Chemistry Reference
In-Depth Information
taBLe 6.2
Bioaccumulation of PcB Isomers by Seabirds
number of
unsubstituted adjacent
carbons
enrichment
Index
Seabirds
b
Isomer cl Substitution
IuPac
number
ring 1
ring 2
om
mp
relative Bf
a
74
4
2,4,5
2
0
0.86
66
2,4
3,4
2
0
0.43
99
c
2,4
2,4,5
1
0
0.74
114
4
2,3,4,5
2
0
<0.1
118
c
3,4
2,4,5
1
0
0.83
23.60
146
2,3,5
2,4,5
0
0
1.00
153
c
2,4,5
2,4,5
0
0
1.00
1.44
105
3,4
2,3,4
2
0
0.57
138
2,3,4
2,4
0
0
0.93
3.10
178
2,3,5
2,3,4,6
0
0
0.52
187
c
2,4,5
2,3,5,6
0
0
0.94
128
c
2,3,4
2,3,4
2
0
0.77
177
2,3,4
2,3,5,6
1
0
0.59
180
c
2,4,5
2,3,4,5
0
0
1.10
1.28
170
c
2,3,4
2,3,4,5
1
0
1.05
1.35
201
2,3,5,6
2,3,4,5
0
0
0.98
196
c
2,3,4,5
2,3,4,6
0
0
1.07
194
c
2,3,4,4
2,3,4,5
0
0
0.90
202
2,3,5,6
2,3,5,6
0
0
3.52
52
2,5
2,5
0
2
<0.1
70
2.5
3,4
1
1
0.02
101
2,5
2,4,5
0
1
0.24
0.40
97
2,3
2,4,5
1
1
<0.1
0.20
87
2,5
2,3,4
1
1
0.12
110
3,4
2,3,6
1
1
0.21
151
2,5
2,3,5,6
0
1
0.02
0.1
149
2,3,6
2,4,5
0
1
0.18
0.17
141
2,5
2,3,4,5
0
1
0.19
174
2,3,6
2,3,4,5
0
1
0.07
a
Bioaccumulation factor (BF) of herring gull (
Larus argentatus
) eggs/Alewife (
Alosa pseudoharengus
)
relative to PCB no 153 (Norstrom 1988).
b
The enrichment index, which is PCB congener as a percentage of total PCB in seabird depot fat/PCB as
a percentage of total PCB in Aroclor 1260.
c
Among the 14 PCB congeners found at the highest concentration in eggs from the Mediterranean Sea
and the Atlantic Ocean (Renzoni et al. 1986). These authors also found numbers 156, 172, and 183.
Numbers 172 and 183 were also reported in Borlakoglu et al. (1988).
Search WWH ::
Custom Search