Composition

Chemical structure

Content in PB crude oil (%)

Content in HB crude oil (%)

Naphthalene series

17.71

11.07

Phenanthrene series

26.34

46.32

Chrysene series

4.33

11.06

Benzopyren + Methylpyrene

1.44

6.21

Thiophene series

4.77

2.82

Biphenyl series

1.87

0.97

Furanseries

1.65

1.06

Fluorene

2.37

2.92

Fluoranthene

0.13

0.96

Benzofluorene

0.20

0.94

Triaromatic steroid

39.19

15.65