Table 1.
Relative percentile levels of volatile components detected in young and old mature L. aegyptiaca fruit using SPME-GC–MS measurements (n = 3).
| Peak | Rt (min) | KI | Identification | Class | Mature average ± Std. Dev. | Young average ± Std. Dev. |
|---|---|---|---|---|---|---|
| Fatty acid | ||||||
| 1 | 8.51 | 951 | Pentanoic acid | 2.67 ± 2.01 | 0.46 ± 0.37 | |
| 2 | 10.01 | 1071 | Heptanoic acid | 0.85 ± 0.55 | 0.24 ± 0.20 | |
| 3 | 11.42 | 1180 | Octanoic acid | 3.93 ± 2.30 | 1.46 ± 0.77 | |
| 4 | 12.71 | 1270 | Nonanoic acid | 3.86 ± 2.02 | 1.60 ± 0.84 | |
| Total Fatty Acids | 11.30 | 3.76 | ||||
| 5 | 8.49 | 949 | 1-Octen-3-ol | Alcohol | 6.85 ± 9.55 | 15.94 ± 1.01 |
| 6 | 8.78 | 971 | 3-Octanol | 0.74 ± 0.73 | 2.15 ± 0.16 | |
| 7 | 9.29 | 1010 | 6,6-Dimethyl-1,3-heptadien-5-ol | 3.45 ± 2.77 | 0.91 ± 0.52 | |
| 8 | 9.43 | 1045 | Benzyl alcohol | 0.49 ± 0.19 | 0.27 ± 0.09 | |
| 9 | 9.98 | 1080 | Dihydromyrcenol | 2.23 ± 1.30 | 0.10 ± 0.05 | |
| 10 | 10.39 | 1107 | β-Linalool | 1.62 ± 0.09 | 9.86 ± 3.38 | |
| 11 | 10.67 | 1127 | Phenylethyl Alcohol | 0.34 ± 0.12 | 0.29 ± 0.21 | |
| 12 | 11.19 | 1164 | β-Terpineol | 0.54 ± 0.30 | 0.40 ± 0.12 | |
| 13 | 11.57 | 1191 | Camphol | 0.52 ± 0.25 | 1.88 ± 0.61 | |
| 14 | 11.85 | 1211 | α-Terpineol | 1.99 ± 1.45 | 0.16 ± 0.08 | |
| 15 | 13.23 | 1317 | Z-2-Dodecenol | 0.81 ± 0.41 | 0.13 ± 0.06 | |
| Total Alcohols | 19.59 | 32.08 | ||||
| 16 | 6.19 | 773 | 2-Hexenal | Aldehyde/furan | 0.17 ± 0.50 | 10.58 ± 1.26 |
| 17 | 6.56 | 879 | 3-Furanmethanol | 0.19 ± 0.32 | 1.69 ± 0.19 | |
| 18 | 7.08 | 906 | Heptanal | 0.68 ± 0.41 | 0.29 ± 0.07 | |
| 19 | 8.22 | 929 | Benzaldehyde | 0.06 ± 0.40 | 4.09 ± 1.38 | |
| 20 | 8.63 | 960 | 2-n-Pentylfuran | 0.02 ± 0.01 | 0.01 ± 0.01 | |
| 21 | 8.86 | 1009 | Octanal | 0.50 ± 0.21 | 0.36 ± 0.08 | |
| 22 | 9.57 | 1054 | Benzenacetaldehyde | 0.83 ± 0.67 | 2.57 ± 0.59 | |
| 23 | 9.65 | 1038 | Cumene aldehyde | 0.60 ± 0.34 | 0.17 ± 0.18 | |
| 24 | 9.78 | 1047 | 2-Octenal, (E)- | 0.85 ± 0.21 | 1.06 ± 0.44 | |
| 25 | 10.45 | 1111 | Nonanal | 8.76 ± 1.84 | 1.67 ± 0.38 | |
| 26 | 11.18 | 1163 | Nonadienal(cucumberaldehyde) | 1.03 ± 0.99 | 5.39 ± 2.83 | |
| 27 | 11.28 | 1170 | 2-Nonenal, (E)- | 1.97 ± 0.30 | 2.37 ± 0.66 | |
| 28 | 11.90 | 1214 | Decanal | 8.98 ± 3.08 | 0.77 ± 0.05 | |
| 29 | 12.16 | 1234 | p-Phthalaldehyde | 0.27 ± 0.24 | 0.03 ± 0.01 | |
| Total Aldehyde/Furans | 35.14 | 31.06 | ||||
| 30 | 6.49 | 878 | p-Xylene | Aromatic | 1.93 ± 0.88 | 0.76 ± 0.54 |
| 31 | 8.73 | 967 | Mesitylene (Benzene, 1,3,5-trimethyl-) | 2.22 ± 1.07 | 0.70 ± 0.25 | |
| 32 | 9.25 | 1033 | m-Cymene | 0.26 ± 0.07 | 0.38 ± 0.06 | |
| 33 | 10.09 | 1087 | Dimethylethylbenzene | 0.61 ± 0.30 | 0.13 ± 0.03 | |
| 34 | 10.50 | 1115 | p cymene | 0.14 ± 0.09 | 0 ± 0 | |
| 35 | 11.21 | 1165 | Unknown aromatic | 0.47 ± 0.24 | 0.07 ± 0.04 | |
| 36 | 13.27 | 1320 | β-Methylnaphthalene | 1.66 ± 0.52 | 0.18 ± 0.25 | |
| 37 | 15.71 | 1511 | β-Vinylnaphthalene | 0.54 ± 0.27 | 0.06 ± 0.10 | |
| Total Aromatics | 7.82 | 2.28 | ||||
| 38 | 13.08 | 1304 | Bornyl acetate | Ester | 0.16 ± 0.04 | 0.59 ± 0.22 |
| 39 | 14.09 | 1376 | 3-Hydroxy-2,4,4-trimethylpentyl 2-methylpropanoate | 1.90 ± 1.54 | 0.22 ± 0.05 | |
| 40 | 14.50 | 1420 | Cyclopentanecarboxylic acid, isopropyl ester | 0.09 ± 0.04 | 0.01 ± 0.02 | |
| Total Esters | 2.16 | 0.83 | ||||
| 41 | 8.57 | 955 | 3-Octanone | Ketone | 4.74 ± 3.73 | 26.95 ± 2.02 |
| 42 | 9.20 | 1003 | Acetophenone | 0.74 ± 0.32 | 0.21 ± 0.06 | |
| 43 | 11.78 | 1205 | 2,4-Dimethyl-3-hexanone | 5.02 ± 0.66 | 0.50 ± 0.56 | |
| Total ketones | 10.50 | 27.66 | ||||
| 44 | 10.36 | 1104 | n-Undecane | Aliphatic hydrocarbon | 0.33 ± 0.19 | 0.18 ± 0.07 |
| 45 | 13.09 | 1305 | Tridecane | 1.65 ± 1.11 | 0.22 ± 0.06 | |
| 46 | 14.32 | 1393 | Tetradecane | 4.49 ± 2.72 | 0.60 ± 0.27 | |
| 47 | 15.54 | 1505 | Pentadecane | 3.17 ± 2.10 | 0.40 ± 0.25 | |
| 48 | 17.01 | 1601 | Hexadecane | 2.96 ± 2.09 | 0.42 ± 0.41 | |
| Total Aliphatic hydrocarbons | 12.60 | 1.83 | ||||
| 49 | 9.33 | 1014 | Limonene | Monoterpene hydrocarbon | 0.40 ± 0.15 | 0.28 ± 0.07 |
| 50 | 10.77 | 1134 | Isomyocorene | 0.19 ± 0.15 | 0.04 ± 0.03 | |
| 51 | 14.74 | 1440 | Unknown | Sesquiterpene hydrocarbon | 0.06 ± 0.04 | 0 ± 0 |
| Total Terpene hydrocarbons | 0.66 | 0.32 | ||||
| 52 | 11.07 | 1155 | Allyl dithioacetate | sulphur compound | 0.20 ± 0.08 | 0.06 ± 0.05 |
| 53 | 13.87 | 1369 | Eugenol | phenolic ether | 0.03 ± 0.04 | 0.13 ± 0.04 |
| Total Miscellaneous | 0.23 | 0.18 | ||||