Table 1.
Retention times, identified compounds, and relative peak areas (%) from the GC chromatogram of Robusta coffee flower.
| Retention Time (min.)(n = 3) |
Compounds | Relative Peak Area (%) (n = 3) |
|||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 1 | 2 | 3 | ||
| 1.794 | 1.794 | Ethanol | 3.62 | n.d | 3.3 | ||
| 4.309 | Cyclobutylcarboxylic acid | n.d | 0.34 | n.d | |||
| 6.450 | 6.438 | Butanoic acid, 3-methyl-, ethyl ester | 0.17 | n.d | 0.27 | ||
| 6.515 | 1H-Indole, 5-methyl-2-phenyl- | n.d | 0.05 | n.d | |||
| 7.009 | 1-Butanol | n.d | 0.04 | n.d | |||
| 7.693 | Carbamic acid, methyl-, ethyl ester | n.d | n.d | 0.02 | |||
| 8.073 | 2-Heptanol | n.d | n.d | 0.16 | |||
| 8.076 | 2-Pentadecanol | 0.11 | n.d | n.d | |||
| 8.079 | 4-Methyl-2-hexanol | n.d | 0.04 | n.d | |||
| 10.303 | 10.232 | 10.291 | Benzaldehyde | 0.23 | 0.13 | 0.10 | |
| 11.308 | 11.314 | 11.290 | β-Myrcene | 0.67 | 0.73 | 0.54 | |
| 12.574 | 12.574 | 12.568 | d-Limonene | 0.15 | 0.18 | 0.12 | |
| 13.228 | 13.335 | 13.228 | Benzyl alcohol | 4.92 | 3.23 | 3.09 | |
| 14.073 | 14.655 | Ethyl 2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-yl carbonate | 0.69 | 0.53 | n.d | ||
| 14.085 | 14.090 | trans-Linalool oxide (furanoid) | n.d | 0.60 | 0.48 | ||
| 14.810 | 14.822 | 14.804 | Benzoic acid, methyl ester | 2.70 | 1.15 | 1.62 | |
| 15.440 | 15.541 | 15.458 | Linalool | 22.29 | 27.03 | 22.23 | |
| 15.642 | 15.726 | 15.654 | Phenylethyl Alcohol | 0.20 | 0.17 | 0.20 | |
| 15.993 | 16.035 | 15.999 | 2,4,6-Octatriene, 2,6-dimethyl-, (E,Z)- | 0.13 | 0.15 | 0.10 | |
| 16.754 | 16.962 | Benzyl nitrile | 14.56 | 0.04 | n.d | ||
| 16.944 | 3,6-Dimethyl-2,3,3a,4,5,7a-hexahyd robenzofuran | n.d | n.d | 0.05 | |||
| 17.135 | Benzene, (isocyanomethyl)- | n.d | n.d | 1.37 | |||
| 17.135 | 17.141 | Isoneral | 0.04 | 0.04 | n.d | ||
| 17.343 | 17.349 | 17.343 | Benzoic acid, ethyl ester | 1.50 | 0.88 | 1.37 | |
| 17.498 | Deltacyclene | 2.03 | n.d | n.d | |||
| 17.509 | 17.491 | 5H-1-Pyrindine | n.d | 1.74 | 1.54 | ||
| 17.670 | 17.676 | 17.658 | Indole | 1.50 | 1.33 | 1.17 | |
| 17.896 | 17.908 | 17.896 | α-Terpineol | 0.02 | 0.02 | 0.01 | |
| 18.009 | Methyl salicylate | n.d | 0.29 | n.d | |||
| 18.027 | 18.021 | Dodecane | 0.19 | n.d | 0.18 | ||
| 18.687 | 18.693 | 18.687 | 6-Octen-1-ol, 7-methyl-3-methylene | 0.03 | 0.03 | 0.02 | |
| 19.020 | 19.055 | 19.020 | 2,6-Octadien-1-ol, 3,7-dimethyl-, (Z)- | 1.96 | 2.62 | 1.84 | |
| 19.127 | 19.406 | 19.127 | 3,6-Octadien-1-ol, 3,7-dimethyl-,(Z)- | 0.20 | 0.10 | 0.19 | |
| 19.317 | 19.341 | 19.317 | 2,6-Octadienal, 3,7-dimethyl-, (Z) Citral | 0.15 | 0.22 | 0.12 | |
| 19.418 | 19.424 | Benzeneacetic acid, ethyl ester | 0.24 | n.d | 0.38 | ||
| 19.781 | 19.816 | 19.781 | Geraniol | 1.76 | 2.07 | 1.59 | |
| 20.155 | 20.155 | 2,6-Octadienal, 3,7-dimethyl-, (E) | 0.29 | n.d | 0.31 | ||
| 20.173 | 2,6-Octadienal, 3,7-dimethyl- | n.d | 0.38 | n.d | |||
| 20.322 | 2,6-Octadien-1-ol, 3,7-dimethyl-, (Z)- | 0.02 | n.d | n.d | |||
| 20.405 | 2,6-Octadienoic acid, 3,7-dimethyl -, methyl ester | n.d | n.d | 0.01 | |||
| 20.548 | 5-Tridecene, (E)- | 0.04 | n.d | n.d | |||
| 20.554 | 20.548 | 6-Tridecene, (E)- | n.d | 0.04 | 0.03 | ||
| 21.018 | 21.018 | 21.023 | Tridecane | 5.50 | 5.01 | 5.46 | |
| 21.291 | 21.434 | 21.291 | Indole | 0.02 | 0.01 | 0.02 | |
| 21.582 | 21.582 | trans-Geranic acid methyl ester | 0.10 | n.d | 0.11 | ||
| 22.153 | 22.153 | 22.147 | Methyl anthranilate | 0.76 | 0.65 | 0.58 | |
| 22.278 | 22.278 | Benzenepropanoic acid, ethyl ester | 0.14 | n.d | 0.11 | ||
| 23.087 | 5-Tetradecene, (E)- | n.d | 0.02 | n.d | |||
| 23.087 | 3-Tetradecene, (Z)- | n.d | n.d | 0.01 | |||
| 23.081 | 23.206 | 7-Tetradecene, (Z)- | 0.01 | 0.00 | n.d | ||
| 23.331 | 23.331 | 23.330 | 3-Tetradecene, (E)- | 0.03 | 0.03 | 0.03 | |
| 23.551 | 23.551 | 23.550 | Tetradecane | 0.41 | 0.38 | 0.43 | |
| 23.872 | 23.872 | 23.872 | Benzoic acid, 2-(methylamino)-, methyl ester | 0.01 | 0.01 | 0.01 | |
| 24.175 | Caryophyllene | n.d | 0.00 | n.d | |||
| 25.754 | 25.751 | 25.750 | 1-Tridecene | 4.56 | 4.36 | 4.60 | |
| 25.858 | n-Tridecan-1-ol | 1.07 | n.d | n.d | |||
| 25.858 | 25.857 | Cyclopentadecane | n.d | 1.00 | 1.09 | ||
| 26.583 | 26.583 | 26.607 | Pentadecane | 18.68 | 17.12 | 19.24 | |
| 28.064 | Succinic acid, di(3-methylbut-3-enyl) ester | 0.00 | n.d | n.d | |||
| 28.069 | Succinic acid, hex-4-yn-3-yl 3-methylbut-3-en-1-yl ester | n.d | n.d | 0.00 | |||
| 28.064 | Supraene | n.d | 0.00 | n.d | |||
| 28.301 | Benzene, [(2,2-dimethylcyclopropyl)methyl]- | 0.00 | n.d | n.d | |||
| 28.593 | 28.593 | (3E,7E)-4,8,12-Trimethyltrideca-1,3,7,11-tetraene | 0.07 | n.d | 0.09 | ||
| 28.593 | Squalene | n.d | 0.00 | n.d | |||
| 29.134 | 29.128 | 29.134 | Hexadecane | 0.07 | 0.05 | 0.06 | |
| 29.532 | Pentadecanal- | 0.03 | n.d | n.d | |||
| 29.532 | 29.532 | Tetradecanal | n.d | 0.05 | 0.02 | ||
| 31.072 | 31.072 | 31.072 | 6,9-Heptadecadiene | 0.27 | 0.05 | 0.28 | |
| 31.209 | 31.209 | 1,4-Cyclooctadiene, (Z,Z)- | 0.17 | n.d | 0.16 | ||
| 31.209 | Tricyclo[4.2.1.1(2,5)]decan-3-ol | n.d | 0.18 | n.d | |||
| 31.411 | 31.399 | 31.411 | 8-Heptadecene | 3.51 | 2.86 | 3.34 | |
| 31.893 | 31.881 | 31.893 | Heptadecene | 1.21 | 0.95 | 1.22 | |
| 32.089 | Pentadecafluorooctanoic acid, dodecyl ester | n.d | 0.01 | n.d | |||
| 32.095 | 32.243 | Cyclopentane, pentyl- | 0.01 | n.d | 0.00 | ||
| 32.244 | 3,6-Octadienal, 3,7-dimethyl- | 0.01 | n.d | n.d | |||
| 32.244 | Cyclohexene, 4-methyl- | n.d | 0.01 | n.d | |||
| 32.434 | 3,4-Octadiene, 7-methyl- | n.d | 0.01 | n.d | |||
| 32.440 | Cyclododecene, (E)- | 0.01 | n.d | n.d | |||
| 32.440 | E,E-10,12-Hexadecadienal | n.d | n.d | 0.00 | |||
| 33.260 | 33.260 | 33.266 | Z,Z-10,12-Hexadecadienal | 0.00 | 0.00 | 0.00 | |
| 34.241 | 34.247 | Octadecane | n.d | 0.03 | 0.03 | ||
| 34.247 | Dodecane, 2,6,11-trimethyl- | 0.03 | n.d | n.d | |||
| 34.396 | 34.396 | cis-11-Hexadecenal | 0.00 | 0.01 | n.d | ||
| 34.396 | 13-Octadecenal, (Z)- | n.d | n.d | 0.00 | |||
| 34.669 | 34.670 | Tetradecanal | 0.16 | 0.18 | n.d | ||
| 34.669 | Hexadecanal | n.d | n.d | 0.17 | |||
| 34.872 | Isopropyl myristate | 0.00 | n.d | n.d | |||
| 35.692 | 9-Tetradecen-1-ol, acetate, (Z)- | n.d | n.d | 0.01 | |||
| 35.698 | 1,9-Tetradecadiene | 0.01 | n.d | n.d | |||
| 35.787 | Z-1,6-Tridecadiene | 0.01 | n.d | n.d | |||
| 35.787 | 35.787 | Cyclododecene | n.d | 0.01 | 0.01 | ||
| 35.924 | 9,12,15-Octadecatrienal | 0.01 | n.d | n.d | |||
| 35.924 | 35.924 | 9,12-Octadecadien-1-ol, (Z,Z) | n.d | 0.01 | 0.01 | ||
| 36.019 | 36.138 | 9-Nonadecene | 0.02 | 0.00 | n.d | ||
| 36.019 | 36.019 | Z-5-Nonadecene | n.d | 0.02 | 0.02 | ||
| 36.120 | Cyclotetradecane | n.d | n.d | 0.02 | |||
| 36.126 | 1-Nonadecene | 0.02 | n.d | n.d | |||
| 36.501 | 36.501 | 36.507 | Nonadecane | 0.47 | 0.46 | 0.55 | |
| 38.546 | 38.540 | 38.540 | Eicosane | 0.01 | 0.01 | 0.01 | |
| 40.479 | 40.479 | 40.479 | Heneicosane | 0.02 | 0.02 | 0.06 | |
| 43.594 | 43.600 | 43.594 | 9-Tricosene, (Z)- | 0.00 | 0.00 | 0.00 | |