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a
Petrogenic
2-Ring PAHs
NA
b
Loss of Light
2-Ring PAHs
NA
c
Loss of More Light
2-Ring PAHs
NA
d
Petrogenic
2- and 3-Ring PAHs
Trace Petrogenic
4-Ring PAHs
NA
e
Slightly Higher
Petrogenic
4-Ring PAHs
NA
f
Higher
Petrogenic
4-Ring PAHs
Lower
2-Ring
PAHs
NA
Fig. 4
PAH profiles during combustion of fossil fuels. (
a
) kerosene, (
b
) kerosene combusted 50%,
(
c
) kerosene combustion residue, (
d
) middle petroleum distillate (diesel), (
e
) diesel combusted
50%, (
f
) diesel combustion residue.
NA
: not analyzed. See Table
1
for PAH abbreviations. Adapted
from Douglas et al. (
2007a
), with permission, © Elsevier Academic Press
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