Table 1 The proportions of total PAHs, SHs and polar components.

From: Fingerprint analysis reveals sources of petroleum hydrocarbons in soils of different geographical oilfields of China and its ecological assessment

Oilfield

Sample sites

Percentage composition (%)

PAHs

SHs

Polar components

SL oilfield

S1

23.1

55.3

21.6

S2

24.5

58.7

16.8

S3

26.8

60.1

13.1

S4

30.4

62.2

7.4

S5

23.6

59.5

16.9

S6

22.4

58.3

19.3

S7

25.2

68.5

6.3

S8

24.7

69.4

5.9

S9

25.1

72.2

2.7

S10

23.3

71.4

5.3

S11

22.2

75.9

1.9

S12

23.6

72.3

4.1

NY oilfield

N1

23.1

66.7

10.2

N2

22.2

75.3

2.5

N3

23.6

71.6

4.8

N4

34.7

54.9

10.4

N5

22.5

72.4

5.1

N6

23.5

67.8

8.7

N7

25.1

64.2

10.7

N8

34.1

56.8

9.1

N9

25.5

72.1

2.4

N10

23.2

70.2

6.6

YC oilfield

Y1

34.4

56.1

9.5

Y2

20.6

50.2

29.2

Y3

25.2

72.5

2.3

Y4

26.3

56.8

16.9

Y5

31.5

60.4

8.1

Y6

23.3

74.2

2.5

Y7

23.1

59.6

17.3

Y8

24.4

57

18.6

Y9

23.6

60.7

15.7

Y10

22.5

56.6

20.9

Y11

26.8

56.3

16.9

Y12

23.1

60.2

16.7

Y13

24.6

58.3

17.1

Y14

22.4

59.1

18.5

Y15

23.4

72.2

4.4

Y16

23.7

52.2

24.1

Y17

25.8

51.4

22.8

Y18

24.6

50.6

24.8

Y19

23.8

51.7

24.5

Y20

23.1

58.4

18.5

Y21

30.5

61.1

8.4

Y22

23.5

53.2

23.3

Y23

30.8

60.6

8.6

Y24

25.3

52.1

22.6

Y25

28.1

56.2

15.7

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