Table 1 Phytochemical composition of A. citriodora essential oil collected from four locations in Palestine

1

4,4-Dimethyl-2-butenolide

–

–

0.17

–

945

10.45

2

Sabinene

–

–

–

0.14

970

11.55

3

6-Methylhept-5-en-2-one

0.22

–

0.54

1.67

984

12.20

4

Limonene

0.74

0.86

0.21

4.06

1026

14.03

5

1,8-Cineole

0.09

0.32

2.70

3.96

1030

14.19

6

cis-Ocimene

–

0.05

–

0.02

1034

14.38

7

trans-Ocimene

–

0.22

–

0.51

1045

14.82

8

ND

–

–

0.02

–

1051

15.07

9

3-Methylcyclohex-2-en-1-one

–

–

0.24

0.19

1052

15.13

11

cis-Sabinene hydrate

0.06

0.12

–

–

1068

15.85

12

cis-4-Thujanol

–

0.28

–

–

1097

17.05

13

α-Thujone

–

–

0.17

0.12

1101

17.19

15

6-Camphenol

–

–

–

0.04

1107

17.42

16

cis-p-Menth-2-en-1-ol

–

–

0.05

–

1023

18.08

17

1-Terpineol

–

–

0.07

0.17

1135

18.52

19

exo-Isocitral

–

–

0.15

–

1140

18.74

20

γ-Geraniol

–

–

–

0.12

1140

18.74

21

Veratrole other

–

–

0.24

–

1145

18.93

22

Sabina ketone

–

–

0.11

–

1155

19.32

23

Rosefuran epoxide

–

–

0.10

–

1167

19.79

24

β-Pinene oxide

–

–

–

0.29

1145

18.94

25

Ethyl chrysanthemate

–

–

–

0.05

1149

19.09

26

Citronellal

–

–

–

0.21

1167

19.79

28

Isogeranial

0.06

0.91

0.30

0.22

1177

20.19

29

Ethyl-3(2-furyl)-propanoate

–

–

–

0.09

1181

20.335

30

Isomenthol

–

–

0.31

–

1181

20.34

31

cis-Dihydrocarvone

–

–

0.39

–

1190

20.68

32

4-Methylguaicol other

–

–

–

0.09

1190

20.68

33

α-Terpineol

0.76

1.06

–

–

1192

20.755

34

Isodihydro carveol

–

–

0.4

0.86

1210

21.415

36

Linalool formate

–

–

1.3

0.37

1216

21.66

37

cis-4-Thujanol acetate

–

–

–

0.07

1222

21.86

38

neoisoDihydro carveol

–

–

0.27

0.05

1225

21.99

40

Nerol

0.44

1.01

0.18

0.05

1228

22.076

42

Neral

7.59

29

25.46

18.35

1236

22.36

43

Carvone

–

–

1.22

0.23

1241

22.53

44

Geraniol

–

1.26

–

–

1249

22.82

45

Piperitone

–

–

0.62

0.30

1251

22.89

46

Methyl citronellate

0.49

–

–

–

1251

22.92

47

Geranial

10.79

37

37.22

26.32

1265

23.421

49

Citronellyl formate

–

–

0.33

0.11

1276

23.80

50

Thymol

–

0.96

–

–

1295

24.50

51

Ethyl nerolate

–

–

0.44

–

1348

26.26

52

Neric acid

0.22

–

–

–

1351

26.35

53

Geranyl acetate

–

–

0.8

–

1373

27.13

54

α-Ylangene

3.00

1.13

–

2.15

1374

27.133

55

Bourbonene

1.47

–

0.30

0.47

1382

27.38

57

Methyl eugenol

–

–

0.42

–

1395

27.89

58

Sesquithujene

0.25

–

–

0.07

1399

27.96

59

α-Cedrene

2.19

–

0.44

0.56

1415

28.45

61

Β-Caryophyllene

6.14

6.00

1.54

7.95

1419

28.55

62

β-Cedrene

0.63

0.16

–

0.29

1422

28.69

63

α-Caryophyllene S

0.62

0.1

0.31

0.38

1454

29.68

64

Allaromadendrene

1.68

0.41

–

1.05

1459

29.83

ND

0.75

1465

30.034

65

10-β-Cadina-1(6),4-diene

–

–

–

0.12

1474

30.30

66

α-Curcumene

26.94

7.76

14.64

16.91

1479

30.45

67

α-Zingiberene

–

–

–

0.54

1492

30.88

69

Bicyclogermacrene

0.09

2.79

–

–

1494

30.94

70

δ-Acoradiene

–

–

–

1.46

1495

30.96

71

β-Bisabolene

0.33

–

–

–

1505

31.27

72

α-Cuprenene

–

2.31

–

1.28

1507

31.32

74

α-Amorphene

–

–

–

0.22

1512

31.48

75

Cubebol

–

0.23

–

–

1514

31.539

76

δ-Cadinene

0.98

–

–

1515

31.541

77

γ-Cadinene

–

–

0.18

1517

31.63

78

α-Cadinene

0.28

–

–

0.06

1536

32.18

79

ND

0.44

–

–

–

1551

32.61

80

E-Nerolidol

3.29

0.32

–

–

1558

31.84

82

Spathulenol

13.69

2.63

–

0.08

1577

33.40

83

Caryophyllene oxide

8.66

1.52

5.75

4.17

1583

33.56

84

Khusien-12-al

–

–

–

0.22

1588

33.71

85

anti-anti-anti-Helifolen-12-al B

–

–

–

0.18

1592

33.84

86

β-Atlantol OS

–

0.23

–

0.79

1606

34.27

88

Humulene epoxide II OS

1.27

–

–

–

1607

34.32

89

ND

–

–

–

0.64

1610

34.35

90

ND

0.25

–

–

–

1615

34.49

91

ND

0.13

0.16

–

0.53

1627

34.84

92

Alloaromadendrene epoxide

0.96

0.24

–

–

1633

35.00

93

Amorph-4-en-7-ol

–

–

–

0.11

1636

35.08

95

τ-Muurolol

3.06

0.72

–

–

1642

35.22

97

α-Cadinol

0.66

0.12

–

–

1655

35.62

98

8-Cedrene-13-ol

0.43

0.10

–

–

1661

35.77

99

ND

0.6

–

–

–

1675

36.16

100

Germacra-4(15),5,10(14)-trien-1-α-ol OSCAR

0.52

–

–

0.18

1690

36.586

102

ND

–

–

2.58

–

2109

46.72

Total identified%

98.6

99.84

97.40

98.08

Monoterpene hydrocarbons

0.74

1.13

0.21

4.73

Oxygenated monoterpenes

20.5

71.92

73.25

51.89

Sesquiterpene hydrocarbons hydrocarbons

44.60

20.66

17.23

33.69

Oxygenated sesquiterpenes

32.54

6.11

5.75

5.73

others

0.22

0.16

0.95

2.04