Table 4 GC × GC–TOFMS analysis results of two reservoirs

1

Hexanal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

2

Heptanal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

3

Benzaldehyde

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

4

2,4-Heptadienal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

5

2-Octenal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

6

Nonanal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

7

2,6-Nonadienal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

8

Decanal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

9

2,4-Decadienal

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

10

2,6,6-Trimethyl-1-cyclohexene-1-carboxaldehyde

5.75

24.47

9.11

26.42

5.86

23.32

11

Ethylbenzene

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

12

p-Xylene

n.d.

6.15

n.d.

5.95

n.d.

3.21

13

1,4-Dichloro-benzene

1.11

n.d.

0.31

n.d.

1.32

n.d.

14

1,3,5-Trichloro-2-methoxy-benzene

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

15

Bis(2-chloroisopropyl) ether

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

16

Butanoic acid, propyl ester

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

17

Indole

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

18

3-Methyl-indole

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

19

Ionone

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

20

Tetramethyl pyrazine

1.33

1.18

1.11

1.23

1.07

1.54

21

Pyrazine

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

22

2-Methoxy-3-(2-methylethyl)-pyrazine/IPMP

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

23

2-Methoxy-3-(2-methylpropyl)-pyrazine/IBMP

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

24

Pyridine

33.06

22.95

45.72

24.63

37.09

21.89

25

2-Methyl-phenol

2.86

9.17

2.46

8.93

2.03

9.24

26

4-Bromo-phenol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

27

3-Methyl-phenol

5.52

4.20

4.97

5.32

4.03

3.79

28

2-Nitro-phenol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

29

2,6-Dimethyl-phenol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

30

2-Chloro-phenol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

31

Dimethyl sulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

32

Diethyl sulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

33

Dimethyl disulfide

8.48

0.34

3.21

n.d.

6.79

0.56

34

Diisopropyl sulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

35

Propyl sulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

36

Diethyl disulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

37

Dimethyl trisulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

38

Butyl sulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

39

Dipropyl disulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

40

Amyl sulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

41

Dibutyl disulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

42

Dipentyl disulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

43

Benzyl disulfide

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

44

1-Pentanethiol

5.58

6.95

6.73

7.32

5.65

7.57

45

1-Heptanethiol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

46

1-Octanethiol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

47

1-Nonanethiol

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

48

Thiomorpholine

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

49

Thiazole

8.25

20.9

8.75

21.35

9.02

22.09

50

Pentachlorothioanisole

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

51

Indane

n.d.

n.d.

n.d.

n.d.

n.d.

n.d.

52

Eucalyptol

n.d.

1.82

n.d.

2.01

n.d.

1.53

53

2-Methylisoborneol

n.d.

35.85

n.d.

52.87

n.d.

22.13

54

Geosmin

2.04

1.65

4.21

7.98

1.21

6.99