Table 1.
Relative contents of headspace volatiles at different tea/water ratios
| Compounds | RI | Relative content (%) (mean ± SD)b | |||
|---|---|---|---|---|---|
| 1:3 | 1:10 | 1:20 | 1:50 | ||
| Dodecane | 1200 | 0.24 ± 0.07 | ND | ND | ND |
| (E)-β-Ocimene | 1257 | 4.24 ± 0.76 | 3.11 ± 0.37 | 1.81 ± 0.35 | 0.98 ± 0.14 |
| Tridecane | 1300 | 0.70 ± 0.04 | ND | ND | ND |
| 2-Ethenyl-1,1-dimethyl-3-methylidene-cyclohexane | 1316 | 5.31 ± 0.89 | 3.42 ± 0.20 | 1.44 ± 0.30 | ND |
| (E)-β-Farnesene | 1673 | 2.08 ± 0.36 | 2.48 ± 0.54 | 3.46 ± 0.53 | 3.48 ± 0.02 |
| β-Bisabolene | 1724 | 0.47 ± 0.16 | 0.53 ± 0.09 | ND | ND |
| α-Bergamotene | 1729 | 0.94 ± 0.12 | 0.86 ± 0.10 | 0.93 ± 0.10 | 0.84 ± 0.02 |
| Naphthalene | 1735 | 1.73 ± 0.61 | 2.52 ± 0.50 | 2.69 ± 0.50 | 4.13 ± 0.62 |
| α-Farnesene | 1754 | 10.16 ± 0.58 | 7.87 ± 0.25 | 3.97 ± 0.68 | 1.70 ± 0.06 |
| 1-Methylnaphthalene | 1776 | 0.14 ± 0.01 | 0.14 ± 0.03 | 0.20 ± 0.00 | ND |
| Hydrocarbon | 26.01 ± 1.56 | 20.93 ± 0.53 | 14.49 ± 1.89 | 11.14 ± 0.68 | |
| Linalool | 1562 | 1.59 ± 0.10 | 1.76 ± 0.31 | 1.50 ± 0.07 | 1.62 ± 0.02 |
| Benzyl alcohol | 1837 | 0.39 ± 0.00 | 0.26 ± 0.00 | ND | ND |
| 2-Phenylethyl alcohol | 1897 | 6.52 ± 1.23 | 3.20 ± 0.66 | 1.89 ± 0.17 | ND |
| Nerolidol | 12.66 ± 0.54 | 19.81 ± 1.91 | 23.59 ± 1.13 | 23.59 ± 5.74 | |
| Alcohols | 21.16 ± 1.33 | 25.03 ± 2.53 | 26.98 ± 0.75 | 25.21 ± 2.88 | |
| Isopentyl hexanoate | 1471 | 0.78 ± 0.05 | 0.69 ± 0.12 | ND | ND |
| (Z)-3-Hexenyl butanoate | 1475 | 0.55 ± 0.05 | 0.75 ± 0.06 | ND | ND |
| (Z)-3-Hexenyl hexanoate | 1664 | 1.76 ± 0.07 | 2.27 ± 0.07 | 1.50 ± 0.09 | 1.14 ± 0.26 |
| Methyl salicylate | 1769 | 0.49 ± 0.08 | 0.65 ± 0.18 | 0.68 ± 0.04 | 0.54 ± 0.14 |
| Phenethyl isobutyrate | 1843 | 0.92 ± 0.11 | 1.02 ± 0.14 | 1.05 ± 0.12 | 1.11 ± 0.30 |
| 2-Phenylethyl butanoic acid, 2-methyl-, 2-phenylethyl ester | 1968 | 2.41 ± 0.13 | 3.44 ± 0.51 | 3.58 ± 0.33 | 5.01 ± 1.33 |
| Esters | 6.91 ± 0.09 | 8.82 ± 0.51 | 6.80 ± 0.40 | 7.79 ± 1.02 | |
| Nonanal | 1406 | 0.84 ± 0.20 | ND | ND | ND |
| Benzaldehyde | 1531 | 1.58 ± 0.10 | 1.49 ± 0.37 | 2.40 ± 0.28 | 3.87 ± 0.77 |
| Benzeneacetaldehyde | 1648 | 3.34 ± 0.33 | 3.59 ± 0.45 | 4.32 ± 0.42 | 4.93 ± 0.58 |
| Aldehydes | 5.75 ± 0.62 | 5.08 ± 0.73 | 6.72 ± 0.22 | 8.80 ± 0.20 | |
| 6-Methyl-5-hepten-2-one | 1348 | 1.55 ± 0.33 | 1.51 ± 0.13 | 1.69 ± 0.24 | 2.21 ± 0.36 |
| β-Ionone | 1905 | ND | 0.25 ± 0.03 | 0.15 ± 0.04 | 0.18 ± 0.00 |
| (Z)-Jasmone | 1912 | 0.49 ± 0.09 | 0.57 ± 0.05 | 0.43 ± 0.04 | 0.28 ± 0.04 |
| Ketones | 2.04 ± 0.29 | 2.33 ± 0.18 | 2.27 ± 0.13 | 2.67 ± 0.18 | |
| Benzyl nitrile | 1916 | 5.81 ± 0.35 | 4.77 ± 0.21 | 4.56 ± 0.26 | 3.87 ± 0.18 |
| Unknown-1a | 1955 | 0.65 ± 0.04 | 0.91 ± 0.17 | 1.01 ± 0.05 | 1.12 ± 0.22 |
| Unknown-2a | 2.48 ± 0.14 | 2.66 ± 0.21 | 2.17 ± 0.15 | 2.20 ± 0.18 | |
| Indole | 17.80 ± 1.54 | 18.19 ± 0.93 | 20.24 ± 1.95 | 17.63 ± 1.38 | |
| Total | 88.60 ± 1.09 | 88.73 ± 1.96 | 85.24 ± 2.97 | 80.44 ± 3.73 | |
| (Number of volatiles) | (29) | (27) | (23) | (20) | |
RI retention indices
aMass spectral ions (relative abundance in %): unknown-1: m/z = 104 (100), 207 (50); unknown-2: m/z = 104 (100), 105 (38), 77 (25), 103 (20). retention time: unknown-1: 38.92 min; unknown-2: 43.75 min
bRelative content, percent normalized peak areas (n = 3)