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a
Petrogenic
2- to 4-Ring PAHs
b
Predominantly
Petrogenic
2- to 4-Ring PAHs
c
Higher
Petrogenic
3- to 4-Ring PAHs
d
Higher
Petrogenic
3- to 4-Ring PAHs
e
Predominantly
10W30 Used
10W30 New
Likely
Weathered
Pyrogenic
Petrogenic
3- to 4-Ring PAHs
Some Pyrogenic
4- to 6-Ring PAHs
Fig. 1
Source profiles/fingerprints of characteristic petrogenic PAHs. (
a
) crude oil, (
b
) fuel oil #2,
(
c
) fuel oil #4, (
d
) fuel oil #6, (
e
) new and used lubricating oils. See Table
1
for PAH abbreviations.
Adapted from Douglas et al. (
2007a
), with permission, © Elsevier Academic Press
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