Table 2.
Volatile compounds identified in different teas by GC-MS.
| No. | Volatile Compounds | Relative Content (%) | Odor Description # | ||
|---|---|---|---|---|---|
| FTL | BT | GT | |||
| Aldehydes | |||||
| 1 | Hexanal | 4.87 | 1.91 | 0.97 | Grassy, green, fresh, fatty |
| 2 | Heptanal | 0.34 | 0.07 | 0.58 | Green, oily, grassy |
| 3 | Octanal | 0.68 | ND | ND | Fruity |
| 4 | (E,E)-2,4-Heptadienal | 1.52 | 1.65 | 13.46 | nutty, green |
| 5 | (E)-2-Octenal | 1.23 | ND | ND | — |
| 6 | Benzeneacetaldehyde | 2.28 | 0.83 | ND | Floral, green, sweet |
| 7 | Nonanal | 2 | 0.63 | 0.48 | Floral, green, lemon-like |
| 8 | 13-Tetradecenal | 0.76 | 0.38 | 0.41 | — |
| 9 | 2-ethyl-Benzaldehyde | ND | ND | 0.03 | — |
| 10 | Decanal | 0.8 | 0.5 | 0.31 | Orange, sweet |
| 11 | safranal | 0.07 | 0.38 | ND | Herbal, fruit |
| 12 | β-Cyclocitral | 0.96 | ND | ND | Herbal, clean, rose-like, fruity |
| 13 | β-Homocyclocitral | 0.3 | 0.03 | ND | Camphor, cool wood |
| 14 | Citral | ND | 0.13 | ND | |
| 15 | (E,E)-2,4-Decadienal | ND | ND | 0.22 | Cucumber, melon |
| 16 | 2-[4-methyl-6-(2,6,6-trimethylcyclohex-1-enyl)hexa-1,3,5-trienyl]cyclohex-1-en-1-carboxaldehyde | 0.01 | 0.18 | ND | — |
| sum | 15.82 | 6.69 | 16.46 | ||
| Alcohols | |||||
| 1 | 6-Methyl- bicyclo [4.2.0]octan-7-ol | 0.28 | 0.15 | ND | — |
| 2 | Linalool oxide I | ND | 1.11 | 1.48 | Sweet, floral, creamy |
| 3 | Benzyl alcohol | ND | ND | 0.55 | Sweet, floral, rose-like, caramel |
| 4 | 1-[(1-Ethynylcyclohexyl)oxy]-2-propanol | 0.03 | ND | ND | — |
| 5 | Linalool oxide II | ND | 1.99 | ND | Sweet, floral, creamy |
| 6 | Linalool | 2.2 | 7.07 | 4.86 | Floral, fruit, green, orange-like |
| 7 | 8-hydroxylinalool | ND | 0.04 | ND | — |
| 8 | trans-Carveol | ND | 0.11 | ND | — |
| 9 | Phenylethyl Alcohol | 2.02 | 2.14 | 0.18 | Floral, rose-like |
| 10 | α-Methyl-α-[4-methyl-3-pentenyl] oxiranemethanol | 0.14 | ND | ND | — |
| 11 | linalool oxideIII | ND | 0.25 | ND | Floral, honey-like |
| 12 | homocamphenilol | 0.06 | ND | ND | — |
| 13 | Homomyrtenol | ND | 0.41 | ND | — |
| 14 | α-terpineol | ND | ND | 0.12 | Pleasant, floral |
| 15 | (Z)- 3,7- dimethyl- isobutyrate -2-Octen-1-ol | ND | ND | 0.26 | — |
| 16 | 13-Tetradecenal | 2.14 | ND | ND | — |
| 17 | Geraniol | ND | 6.27 | 0.99 | Rose-like, sweet, honey-like |
| 18 | 2-methyl-4-(1,3,3- trimeth yl-7- oxa bicyclo [4.1.0] hept-2-yl)-3-Buten-2-ol | 0.51 | ND | ND | — |
| 19 | (6-Hydroxymethyl-2,3- dimethylphenyl)methanol | ND | 0.88 | 1.12 | — |
| 20 | humulol | ND | 0.5 | ND | — |
| 21 | 1-Heptatriacotanol | 0.62 | 0.62 | 0.61 | — |
| 22 | 2,2,6-Trimethyl-1-(3-methylbuta-1,3-dienyl)-7-oxabicyclo [4.1.0]heptan-3-ol | 0.07 | ND | ND | — |
| 23 | [1S-(1.alpha.,3.beta.,3a.beta.,4.alpha.,8a.beta.)]-1,4-decahydro-1,5,5,8atetramethyl -Methanoazulen-3-ol | 0.03 | ND | ND | — |
| 24 | 2,2-Dimethyl-6-methylene-1-[3,5-dihydroxy-1-pentenyl]cyclohexan-1-perhydrol | 0.08 | 0.17 | 0.05 | — |
| 25 | tert-Hexadecanethiol | 0.04 | 0.4 | 0.14 | — |
| 26 | Isocalamenediol | 0.44 | ND | ND | — |
| 27 | shyobunol | ND | 2.83 | 1.22 | — |
| 28 | Olivetol | 3.2 | ND | ND | — |
| sum | 11.86 | 24.94 | 11.58 | ||
| Ketones | |||||
| 1 | 2-Nonadecanone | ND | ND | 0.03 | — |
| 2 | sulcatone | ND | 0.81 | 1.75 | Green, fruity |
| 3 | 2,2,6-trimethyl-Cyclohexanone | 0.11 | ND | ND | — |
| 4 | Isophorone | 0.1 | ND | 0.08 | Cooling, woody, sweet, green, fruity |
| 5 | 3,5-Octadien-2-one | ND | ND | 2.91 | Rose-like, lavender-like |
| 6 | 3-Nonen-2-one | ND | 0.04 | ND | — |
| 7 | 4-(2,2,6-Trimethylbicyclo [4.1.0]hept-1-yl)-2-butanon | 0.12 | ND | ND | — |
| 8 | 5,9,9-trimethyl-Spiro [3.6] deca-5,7-dien-1-one | ND | ND | 0.06 | — |
| 9 | 2-Hydroxycyclopentadecanone | ND | ND | 0.06 | — |
| 10 | 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)3-Buten-2-one | 0.49 | 0.69 | 4.8 | — |
| 11 | Geranyl acetone | 1.44 | 1.2 | 1.68 | Fresh, rose-like, floral, green, fruity |
| 12 | β-Ionone | 2.79 | 4.44 | 5.76 | Floral, woody, sweet, fruity, berry |
| 13 | 4-(4-hydroxy-2,2,6-trimethyl-7-oxabicyclo [4.1.0]hept-1-yl)-3-Buten-2-one | 2.45 | 0.9 | 1.24 | — |
| 14 | 1′-carboethoxy-1′-cyano-1,2-dihydro-3′H-Cycloprop(1,2)-5-cholest-1-en-3-one | 1.4 | 0.04 | 0.89 | — |
| sum | 8.9 | 8.12 | 19.26 | ||
| Esters | |||||
| 1 | Linalyl acetate | ND | 0.25 | 0.07 | Fruity, floral |
| 2 | (Z)-verbenyl acetate | ND | 0.33 | ND | — |
| 3 | 2-Methyl-3-methylene-1-cyclopentanecarboxylic acid methyl ester | 0.66 | ND | ND | — |
| 4 | E-2-Hexenyl benzoate | ND | ND | 0.04 | — |
| 5 | Acetic acid,3-(2,2- dimethyl-6-methylene- cyclohexylidene)-1-methyl-butyl ester | ND | ND | 0.12 | — |
| 6 | Terpinyl formate | 0.27 | ND | ND | — |
| 7 | Methyl salicylate | ND | 9.75 | 6.45 | Minty, wintergreen, grass odor |
| 8 | Formic acid, 3,7,11-trimethyl-1,6,10-dodecatrien-3-ylester | ND | 0.27 | ND | — |
| 9 | Terpinyl Acetate | ND | 0.58 | ND | — |
| 10 | Undec-10-ynoic acid, tridec-2-yn-1-ylester | 0.26 | ND | ND | — |
| 11 | 2,5-Octadecadiynoicacid, methyl ester | ND | ND | 0.21 | — |
| 12 | Fumaric acid, 2-pentyl tridec-2-yn-1-yl ester | ND | 0.09 | ND | — |
| 13 | Undec-10-ynoic acid, dodecyl ester | ND | ND | 0.02 | — |
| 14 | Z-(13,14-Epoxy)tetradec-11-en-1-ol acetate | 1.22 | ND | ND | — |
| 15 | 10-Methyl-8-tetradecen-1-olacetate | 0.05 | 0.34 | ND | — |
| 16 | Dasycarpidan-1-methanol, acetate | 0.13 | 0.04 | 0.06 | — |
| 17 | 7-Methyl-Z-tetradecen-1-olacetate | 0.38 | 0.58 | 0.28 | — |
| 18 | Dihydroactinidiolide | 2.46 | 0.94 | 0.57 | Sweet, faint floral, herbal |
| 19 | Ethyl iso-allocholate | 2.15 | 1.1 | 0.38 | — |
| sum | 7.58 | 14.27 | 8.2 | ||
| Alkenes | |||||
| 1 | Styrene | 0.19 | ND | 0.45 | Floral |
| 2 | 3-Isopropyl-1-cyclohexene | ND | ND | 0.21 | — |
| 3 | D-Limonene | 13.91 | 8.06 | 2.57 | Citrus, lemon, orange-like, green |
| 4 | Carene | ND | 0.04 | ND | Woody |
| 5 | 3-[(2-methylpropan-2-yl)oxy]bicyclo [3.2.1]oct-3-ene | ND | ND | 0.33 | — |
| 6 | Dipentene dioxide | ND | 0.13 | ND | — |
| 7 | Guaiene | 0.79 | 0.19 | ND | — |
| sum | 14.89 | 8.42 | 3.56 | ||
| Acids | |||||
| 1 | Oleic Acid | 0.92 | 0.58 | 0.31 | — |
| 2 | 3-Hydroxydodecanoic acid | 0.02 | ND | 0.09 | — |
| 3 | cis-7-Hexadecenoic acid | 0.13 | ND | ND | — |
| 4 | cis-4-(Hydroxymethyl) cyclohexanecarboxylic Acid | 0.32 | ND | ND | — |
| 5 | trans-13-Octadecenoicacid | 0.22 | ND | 0.04 | — |
| 6 | Ricinoleic acid | ND | 0.06 | ND | — |
| 7 | Linoleic acid | ND | ND | 0.09 | Oily |
| 8 | cis-5,8,11,14,17-Eicosapentaenoic acid | ND | ND | 0.02 | — |
| 9 | 2-(3-acetoxy-4,4,14-trimethy landrost-8-en-17-yl)- Propanoic acid | 0.13 | 0.11 | 0.29 | — |
| sum | 1.74 | 0.75 | 0.84 | ||
| Alkanes | |||||
| 1 | octyl-Oxirane | ND | 0.24 | ND | — |
| 2 | 2-ethyl-1,1-dimethyl-Cyclopentane | ND | 0.01 | ND | — |
| 3 | 1,2-15,16-Diepoxyhexadecane | ND | 0.09 | ND | — |
| 4 | 4-(Hexadecyloxy)-2-pentadecyl-1,3-dioxane | ND | ND | 0.01 | — |
| 5 | 2,6,10-trimethyl-Tetradecane | ND | ND | 0.02 | — |
| sum | 0 | 0.34 | 0.03 | ||
| Heterocyclics | |||||
| 1 | 2-amino-5-[(2-carboxy)vinyl]-Imidazole | 2.89 | 0.33 | 0.04 | — |
| 2 | 2-pentyl-Furan | 0.87 | 0.4 | 0.34 | Bean, fruity, earthy, green, vegetable |
| sum | 3.76 | 0.73 | 0.38 | ||
| Others | |||||
| 1 | p-Cymene | 1.87 | ND | ND | Aromatic |
| 2 | Geranyl vinyl ether | ND | 0.6 | ND | — |
| 3 | Caffeine | 4.24 | 2.18 | 0.33 | Caffeine |
| 4 | 1,2-Dimyristoyl-sn-glycero-3-phosphocholine | 0.09 | ND | 0.05 | — |
| sum | 6.2 | 2.78 | 0.38 | ||
# Odor description found in the literature (Flavornet; The LRI and Odour Database); —, no odor description information was found in the literature; ND, not detectable. Others, the volatile compounds were not from aldehydes, alcohols, ketones, esters, acids, hydrocarbons, and alkenes compounds. The bold part represents the kind of the compound and the total relative content of each class.