Table 1 Essential oil constituents of Mentha piperita L. by HS/SPME and hydrodistillation methods of this study and the comparison of this study results (hydrodistillation and HS/SPME methods) with the previous studies (Ref. (Rohloff 1999) and (Moradi & Najafian 2015)) in this plant
No. | HS/SPME method | Hydrodistillation method | Results of other studies | ||||||
|---|---|---|---|---|---|---|---|---|---|
Retention time (min) | Compound | % | Retention time (min) | Compound | % | Ref. (Rohloff 1999) SPME | Ref. (Moradi and Najafian 2015) | ||
Hydro D. | HS | ||||||||
1 | 5.171 | 2-Hexenal | 0.08 | 5.171 | 2-Hexenal | 0.16 | – | – | – |
2 | 7.286 | α-Pinene | 1.55 | 7.286 | α-Pinene | 0.79 | 4.12 | 0.85 | 8.06 |
3 | 8.749 | β-Pinene | 2.26 | 7.645 | Camphene | 0.02 | 5.14 | 1.29 | 7.67 |
4 | 9.315 | Myrcene | 0.34 | 8.531 | Sabinene | 0.42 | – | – | – |
5 | 9.812 | l-Phellandrene | 0.15 | 8.749 | β-Pinene | 0.97 | – | – | – |
6 | 10.383 | α-Terpinene | 0.10 | 9.315 | Myrcene | 0.18 | – | – | – |
7 | 10.578 | p-Cymene | 0.03 | 9.56 | 3-Octanol | 0.14 | – | – | – |
8 | 10.978 | 1,8-cineole | 9.45 | 9.812 | l-Phellandrene | 0.06 | 20.29 | 17.85 | |
9 | 11.601 | Δ-3 Carene | 0.07 | 10.383 | α-Terpinene | 0.29 | – | – | – |
10 | 12.047 | γ-Terpinene | 0.25 | 10.578 | p-Cymene | 0.09 | – | – | – |
11 | 12.595 | trans-sabinene hydrate | 1.28 | 10.692 | Dl-limonene | 2.22 | 9.32 | 3.11 | 13.36 |
12 | 13.264 | Terpinolen | 0.12 | 10.978 | 1,8-cineole | 4.46 | – | 6.30 | – |
13 | 14.15 | iso-amyl isovalerat | 0.44 | 11.601 | Δ-3 Carene | 0.18 | –a | –a | –a |
14 | 15.093 | Neo-allo-ocimene | 0.03 | 12.047 | γ-Terpinene | 0.47 | – | – | – |
15 | 16.785 | L-menthone | 16.88 | 12.595 | trans-sabinene hydrate | 0.61 | 16.08 | – | 18.75 |
16 | 17.036 | Menthofuran | 11.38 | 13.264 | Terpinolen | 0.14 | 3.33 | – | 3.98 |
17 | 17.179 | Neo-menthol | 2.37 | 14.15 | iso-amyl isovalerate | 0.15 | –a | –a | –a- |
18 | 18.242 | L-menthol | 29.38 | 14.464 | Thujone | 0.01 | 16.65 | – | 9.28 |
19 | 20.94 | Piperitone | 0.46 | 16.785 | L-menthone | 16.04 | – | 34.86 | – |
20 | 21.694 | 3-menthene | 0.92 | 17.036 | Menthofuran | 8.91 | – | 5.11 | – |
21 | 22.883 | cis-carane | 14.39 | 17.179 | Neo-menthol | 4.24 | – | 23.98 | – |
22 | 23.231 | Neoisomenthyl acetate | 1.02 | 18.242 | L-menthol | 45.34 | – | – | – |
23 | 24.226 | Bicycloelemene | 0.16 | 20.025 | Pulegone | 0.80 | – | – | – |
24 | 25.472 | α-Farnesene | 0.01 | 20.94 | Piperitone | 0.61 | – | – | – |
25 | 25.643 | Ylangene | 0.01 | 21.694 | 3-menthene | 0.42 | – | – | – |
26 | 25.849 | Copaene | 0.09 | 22.883 | cis-carane | 8.70 | – | – | – |
27 | 26.278 | β-Bourbonene | 0.96 | 23.231 | Neoisomenthyl acetate | 0.51 | – | – | – |
28 | 26.449 | β-Cubebene | 0.05 | 23.157 | trans-carane | 0.18 | – | – | |
29 | 26.586 | β- Elemene | 0.12 | 26.278 | β-Bourbonene | 0.21 | – | – | – |
30 | 27.615 | trans-Caryophyllene | 2.76 | 26.586 | β-Elemene | 0.06 | – | – | – |
31 | 27.958 | Calarene | 0.04 | 27.615 | trans-Caryophyllene | 0.79 | – | – | – |
32 | 28.438 | α-Humulene | 0.19 | 28.524 | trans-β-Farnesene | 0.18 | – | – | – |
33 | 28.524 | trans-β-Farnesene | 0.57 | 29.073 | Germacrene-D | 0.82 | – | – | – |
34 | 29.073 | Germacrene-D | 1.41 | 29.33 | Bicyclogermacrene | 0.15 | – | – | – |
35 | 29.33 | Bicyclogermacrene | 0.33 | 29.775 | δ-Cadinene | 0.03 | – | – | – |
36 | 29.775 | δ-Cadinene | 0.10 | 30.701 | Caryophyllene oxide | 0.05 | – | – | – |
37 | 30.016 | α-Muurolene | 0.03 | 30.861 | Viridiflorol | 0.23 | – | – | – |
38 | 30.701 | Caryophyllene oxide | 0.04 | 32.736 | Eicosane | 0.36 | – | – | – |
39 | 30.776 | Hexadecane | 0.03 | 33.456 | Di-isobutyl phthalate | 0.01 | – | – | – |
40 | 30.861 | Viridiflorol | 0.15 | – | – | – | – | – | – |
41 | 33.456 | Di-isobutyl phthalate | 0.01 | – | – | – | – | – | – |
42 | – | iso-menthone | –a | –a | –a | – | 2.98 | 7.99 | 4.63 |