Table 2.
List of compounds with quality higher than 80 with percentage contribution to total area of all peaks of volatiles compounds of the Aloe vera flowers at three maturity stages. Stage I: immature; stage II: mature; stage III: mature with stamens exposed to the outside.
| Compound | CAS Number | RT (min) | Stage I (% Relative) |
Stage II (% Relative) |
Stage III (% Relative) |
|---|---|---|---|---|---|
| VOCs | |||||
| 1-Pentanal | 110-62-3 | 1.650 | 0.66 | 0.55 | 0.66 |
| Butanoic acid | 107-92-6 | 2.251 | 1.67 | 1.34 | 1.85 |
| 1-Hexanal | 66-25-1 | 2.488 | 1.82 | 1.75 | 2.08 |
| 2-Hexenaldehyde | 6728-26-3 | 3.185 | 6.79 | 4.64 | 5.37 |
| Benzene ethenyl | 629-20-9 | 3.786 | 2.61 | 1.89 | 2.02 |
| 1-heptanal | 111-71-7 | 3.980 | 1.35 | 1.28 | - |
| Benzaldehyde | 100-52-7 | 5.198 | 4.94 | 9.27 | 5.00 |
| Hexanoic acid ethyl ester | 123-66-0 | 6.090 | 0.75 | - | - |
| Benzyl alcohol | 100-51-6 | 6.860 | 23.88 | 16.99 | 27.52 |
| Benzeneacetaldehyde | 122-78-1 | 7.109 | 1.81 | 1.48 | 1.67 * |
| Acetophenone | 98-86-2 | 7.621 | 1.35 | 0.62 * | - |
| Phenol, 3-methyl | 108-39-4 | 7.807 | 0.71 | 0.69 | 0.65 |
| Formic acid phenylmethyl ester | 104-57-4 | 7.854 | 0.93 | 0.77 * | 1.21 |
| 1-Nonanal | 124-19-6 | 8.370 | 5.96 | 5.66 | 5.98 |
| Acetic acid benzyl ester | 140-11-4 | 9.731 | 0.75 * | - | 0.75 |
| Dodecane | 112-40-3 | 10.458 | 0.75 * | 0.57 | 0.53 * |
| Tetradecane | 629-59-4 | 15.237 | 1.67 | 2.93 | 1.60 |
| Fatty acids and fatty acid esters | |||||
| Caproic acid | 142-62-1 | 5.676 | 8.12 | 6.35 | 7.32 |
| Octanoic acid methyl ester | 111-11-5 | 8.831 | 0.83 | - | 0.55 |
| Caprylic acid | 124-07-2 | 9.900 | 4.39 | 3.04 | 4.40 |
| Decanoic acid methyl ester | 110-42-9 | 13.44 | 0.64 * | 0.90 | 0.72 * |
| Capric acid | 334-48-5 | 14.442 | 1.34 | 1.00 | 1.23 |
| Dodecanoic acid methyl ester | 111-82-0 | 18.269 | 3.75 | 4.95 | 3.63 |
| Lauric acid | 143-07-7 | 19.186 | 5.98 | 8.06 | 7.71 |
| Tetradecanoic acid methyl ester | 124-10-7 | 22.899 | - | 0.55 | - |
| Myristic acid | 544-63-8 | 23.652 | - | 0.70 | - |
* compound with quality lower than 80. Symbol - means not identified compound. CAS: Chemical Abstracts Service. RT: Retention Time. VOCs: Volatile organic compounds.