Table 1 Volatile component composition (peak area  %) and their amount of nine Mentha spp.

1,3-Diethylbenzene

7.92

ND

ND

ND

ND

ND

ND

6.02 + 0.59

ND

ND

3,5-Dimethylanisole

8.63

ND

ND

ND

ND

ND

ND

2.50 + 0.22

0.49 + 0.04

ND

1,2,3,4,5-Pentamethy-1,3-cyclopentadiene

8.83

ND

ND

ND

ND

ND

ND

0.22 + 0.02

0.54 + 0.05

ND

1,3,3-Trimethyl-tricyclo[2,2,1,0(2,6)]heptane

9.43

ND

ND

0.05 + 0.01

ND

ND

ND

0.10 + 0.01

ND

ND

γ-Terpinene

9.59

5.09 + 0.49

0.18 + 0.01

5.25 + 0.51

1.34 + 0.11

2.28 + 0.21

16.94 + 1.72

2.15 + 0.19

ND

0.34 + 0.03

3-(1-Phenylethoxy)-butanoic acid

9.7

ND

ND

ND

ND

ND

1.39 + 0.12

0.02 + 0.01

ND

ND

2,7-Dimethyl-(Z)-3-octen-5-yne

10.41

ND

0.66 + 0.06

ND

0.02 + 0.01

ND

ND

0.01 + 0.01

1.59 + 0.12

0.21 + 0.02

Terpinolene

10.84

ND

ND

1.40 + 0.12

ND

0.86 + 0.08

ND

1.08 + 0.11

ND

ND

4-Terpineryl acetate

10.95

6.17 + 0.59

1.56 + 0.11

3.72 + 0.31

3.20 + 0.29

2.86 + 0.24

10.53 + 1.03

2.49 + 0.23

ND

0.25 + 0.02

Benzaldehyde

11.25

ND

ND

0.04 + 0.01

0.01 + 0.01

0.04 + 0.01

ND

ND

ND

ND

1,3,5-tri-Methyl-6-methylene-cyclohexene

11.6

0.58 + 0.44

ND

0.07 + 0.01

19.25 + 1.88

0.04 + 0.01

ND

1.01 + 0.10

0.50 + 0.05

0.21 + 0.02

6-Isopropenyl-3-methoxy-3-methyl-cyclohexene

12.01

ND

ND

2.03 + 0.21

ND

ND

ND

0.98 + 0.08

0.75 + 0.07

ND

2-Carene

12.25

ND

ND

2.45 + 0.21

ND

1.22 + 0.11

ND

1.01 + 0.10

4.00 + 0.34

2.84 + 0.21

Myrtenyl acetate

12.42

ND

ND

ND

ND

ND

ND

ND

1.37 + 0.11

ND

D-Limonene

12.6

ND

ND

ND

ND

7.91 + 0.79

ND

4.95 + 0.51

ND

0.40 + 0.04

Eucalyptol

12.72

62.16 + 6.11

11.39 + 1.11

19.49 + 1.87

46.28 + 4.25

22.70 + 2.14

37.36 + 3.60

9.35 + 0.87

18.36 + 1.75

0.40 + 0.03

1-Methyl-1-siabenzocyclobutene

12.92

ND

0.03 + 0.01

0.41 + 0.04

ND

ND

ND

1.54 + 0.11

ND

ND

cis-Sabinene

13.92

ND

ND

1.13 + 0.11

ND

0.67 + 0.06

ND

1.22 + 0.10

ND

ND

2,3-Decadiyne

14.57

ND

ND

0.29 + 0.02

0.28 + 0.02

ND

ND

0.55 + 0.02

1.08 + 0.12

0.28 + 0.02

p-Cymenene

14.66

ND

ND

ND

0.48 + 0.04

ND

ND

3.73 + 0.27

ND

0.22 + 0.02

Isopropenyltoluene

14.71

ND

ND

ND

ND

ND

ND

ND

ND

ND

1-Methyl-4-(methylidene)cyclohexane

14.78

ND

ND

ND

ND

ND

ND

ND

6.31 + 0.55

ND

6-Isopropyldiene-1-methyl-Bicyclo[3,1,0]hexane

14.98

ND

ND

ND

1.44 + 0.11

ND

ND

ND

3.84 + 0.37

ND

2-(Cyclopenta-1-enyl)-thiophene

15.49

0.08 + 0.01

ND

ND

ND

ND

ND

0.05 + 0.01

ND

0.55 + 0.05

1,3-Cyclohexadiene

15.84

ND

0.75 + 0.06

4.10 + 0.26

ND

ND

ND

ND

6.40 + 0.59

ND

2,4,6-Oxtatriene

16.23

ND

0.30 + 0.03

0.02 + 0.01

0.37 + 0.03

ND

ND

1.15 + 0.09

6.28 + 0.61

ND

l-Menthone

16.47

ND

ND

2.00 + 0.17

2.22 + 0.19

7.19 + 0.70

ND

0.96 + 0.09

1.71 + 0.11

ND

Menthol

16.57

4.30 + 0.33

ND

0.83 + 0.08

3.02 + 0.22

36.91 + 3.48

5.62 + 0.54

ND

2.11 + 0.25

11.29 + 1.08

2-Propyl-1,3-cyclohexadiene

16.66

ND

ND

0.01 + 0.01

ND

ND

ND

ND

0.23 + 0.02

ND

Acetic acid phenyl ester

16.8

ND

ND

0.02 + 0.01

ND

ND

ND

ND

ND

ND

Citronella

16.85

2.65 + 0.27

11.04 + 1.01

1.09 + 0.07

ND

ND

ND

ND

ND

1.84 + 0.14

α-Methyl cinnamic aldehyde

18.54

0.61 + 0.06

ND

0.32 + 0.02

ND

ND

ND

ND

ND

0.10 + 0.01

4-(5-Methyl-2-furanyl)-2-butanone

19.19

ND

ND

ND

0.70 + 0.58

2.41 + 0.19

ND

3.71 + 0.34

5.23 + 0.48

1.04 + 0.10

p-Methan-3-one

19.53

ND

ND

ND

ND

ND

ND

31.24 + 4.31

8.13 + 0.77

71.87 + 7.89

Thymol

20.63

ND

ND

1.09 + 0.11

ND

5.31 + 0.48

ND

5.41 + 0.49

ND

2.56 + 0.19

Ascaridole epoxide

20.75

ND

ND

ND

ND

0.02 + 0.01

0.40 + 0.04

3.36 + 0.31

ND

ND

Cubenol

21.38

1.14 + 0.12

0.92 + 0.08

ND

0.70 + 0.58

1.20 + 0.11

1.74 + 0.18

0.58 + 0.48

0.43 + 0.04

0.84 + 0.07

Santolinatriene

21.7

ND

ND

ND

0.96 + 0.80

0.80 + 0.07

ND

ND

ND

ND

α-Cubebene

22.02

0.17 + 0.01

0.72 + 0.06

0.01 + 0.01

0.46 + 0.38

0.02 + 0.01

0.56 + 0.05

ND

0.26 + 0.02

ND

(±)Camphorquinone

22.59

ND

0.42 + 0.04

51.61 + 4.79

ND

1.50 + 0.12

ND

3.84 + 0.37

0.20 + 0.02

1.93 + 0.20

Gemacrene D

22.73

ND

1.34 + 0.12

ND

0.88 + 0.07

0.50 + 0.04

ND

ND

0.47 + 0.04

ND

β-Yiangene

22.99

ND

ND

ND

ND

ND

ND

ND

ND

ND

α-Cedrene

23.07

ND

1.94 + 0.20

ND

ND

0.05 + 0.01

0.86 + 0.09

ND

ND

ND

β-Elemene

23.15

0.60 + 0.06

0.70 + 0.60

ND

0.82 + 0.08

0.04 + 0.01

0.51 + 0.06

ND

0.45 + 0.04

ND

cis-Muurola-3,5-diene

23.24

ND

0.62 + 0.05

ND

ND

0.39 + 0.03

0.22 + 0.03

ND

0.25 + 0.02

ND

2-Methylene-4,8,8-trimethyl-4-vinyl-bicyclo[5,2,0]nonane

23.54

ND

ND

0.01 + 0.01

1.44 + 0.11

0.29 + 0.02

0.22 + 0.02

ND

1.08 + 0.91

ND

α-Gurjunnene

23.6

ND

10.88 + 1.04

ND

ND

ND

0.34 + 0.03

ND

0.91 + 0.08

ND

Caryophyllene

23.86

5.50 + 0.40

8.61 + 0.73

1.01 + 0.14

5.47 + 0.49

1.05 + 0.12

2.42 + 0.25

0.48 + 0.04

9.81 + 0.76

1.36 + 0.10

Panasinsine

24.09

0.85 + 0.07

4.32 + 0.39

0.04 + 0.01

1.00 + 0.09

ND

ND

ND

0.57 + 0.49

ND

α-Bergamotene

24.24

ND

3.60 + 0.24

ND

0.02 + 0.01

0.30 + 0.01

ND

ND

ND

ND

Aromadendrene

24.37

0.17 + 0.01

1.16 + 0.10

ND

ND

0.07 + 0.01

2.24 + 0.20

ND

0.29 + 0.03

ND

α-Copaene

24.54

0.83 + 0.08

1.04 + 0.09

0.06 + 0.01

1.02 + 0.10

0.03 + 0.01

ND

0.75 + 0.07

0.19 + 0.02

ND

Guaia-1(10)-11-diene

24.62

ND

1.55 + 0.12

ND

ND

0.03 + 0.01

0.34 + 0.04

ND

1.47 + 0.13

ND

γ-Elemene

24.73

ND

0.62 + 0.04

ND

0.61 + 0.05

0.02 + 0.01

0.51 + 0.05

ND

1.02 + 0.11

0.02 + 0.01

γ-Muurolene

24.91

ND

0.79 + 0.08

0.01 + 0.01

ND

0.01 + 0.01

0.27 + 0.03

ND

0.39 + 0.04

ND

(+)-epi-Bicyclo sesquiphellandrene

24.97

1.30 + 0.11

1.18 + 0.20

ND

1.28 + 0.11

0.61 + 0.06

0.37 + 0.04

ND

ND

0.04 + 0.01

Isoledene

25.08

0.86 + 0.07

1.25 + 0.20

ND

ND

ND

0.22 + 0.03

1.09 + 0.10

ND

ND

δ-Cadinene

25.22

ND

ND

ND

0.01 + 0.01

0.02 + 0.01

0.18 + 0.02

ND

ND

0.01 + 0.01

β-Copaene

25.29

ND

ND

ND

0.04 + 0.01

0.26 + 0.02

0.13 + 0.01

ND

0.38 + 0.02

0.02 + 0.01

α-Muurolene

25.37

ND

1.21 + 0.19

ND

0.02 + 0.01

ND

0.19 + 0.02

ND

0.28 + 0.03

0.01 + 0.01

α-Curcumene

25.45

0.18 + 0.01

2.33 + 0.20

0.23 + 0.02

ND

0.14 + 0.01

0.05 + 0.01

ND

ND

ND

Isosativene

ND

0.98 + 0.08

0.15 + 0.01

ND

ND

0.35 + 0.03

ND

ND

ND

(+)-Ledene

0.43 + 0.04

2.28 + 0.21

0.13 + 0.01

0.36 + 0.03

ND

1.84 + 0.19

0.21 + 0.02

0.98 + 0.08

ND

(−)-Aristolene

0.14 + 0.01

2.50 + 0.22

0.37 + 0.03

0.25 + 0.02

0.01 + 0.01

ND

ND

0.77 + 0.08

ND

(+)-Cyclosativene

0.42 + 0.03

1.91 + 0.13

0.04 + 0.01

ND

0.28 + 0.02

2.00 + 0.20

ND

0.47 + 0.50

0.02 + 0.01

(−)-Calamenene

2.44 + 0.19

12.17 + 1.22

0.07 + 0.01

3.34 + 0.21

0.33 + 0.03

9.22 + 0.91

ND

5.09 + 0.43

0.92 + 0.08

β-Euaiene

0.17 + 0.01

1.04 + 0.11

ND

0.01 + 0.01

0.04 + 0.01

ND

ND

0.33 + 0.03

ND

α-Calacrene

ND

1.03 + 0.09

ND

0.11 + 0.01

0.02 + 0.01

ND

ND

0.33 + 0.05

ND

Epiglobulol

ND

0.99 + 0.08

ND

ND

0.03 + 0.01

ND

ND

0.49 + 0.03

ND

Mansonone C

ND

ND

ND

ND

ND

ND

ND

0.54 + 0.04

0.01 + 0.01

Di-tert-butyl-4-sec-butylphenol

ND

ND

0.10 + 0.01

ND

0.01 + 0.01

ND

2.99 + 0.19

0.25 + 0.02

0.07 + 0.01

Decanoic acid octyl ester

ND

ND

ND

ND

ND

ND

1.14 + 0.10

ND

ND

Sinerol

1.44 + 0.09

0.04 + 0.01

ND

ND

0.07 + 0.01

ND

0.97 + 0.08

0.67 + 0.05

0.19 + 0.01

Azulol

ND

0.09 + 0.01

ND

ND

ND

ND

ND

0.55 + 0.04

ND

3,5-Bis(tert-butyl)-4-hydroxy-propiohenon

ND

0.85 + 0.08

ND

ND

ND

ND

0.49 + 0.04

ND

ND

(6-tert-Butyl-1,1-dimethyl-2,3-hydro-1H-inda-4-yl) acetic acid

ND

ND

ND

ND

ND

ND

1.23 + 0.11

ND

0.02 + 0.01

5α-androstane

ND

ND

ND

ND

ND

ND

1.12 + 0.11

ND

ND

Total