Table 1.
Key aroma-active compounds identified in Sweetheart lychee.
| Odorant | RI (FFAP) | Odor quality | FD factor | Detection/identificationa |
|---|---|---|---|---|
| Diacetyl | 963 | Stale, yogurt | 4 | O, S |
| 3-Methyl-3-buten-2-one | 976 | Fruity, sweet | 8 | O, MS, S |
| 2-Methyl-2-butanol | 990 | Fruity | 8 | O, MS, S |
| α-Phellandrene | 1122 | Grassy, green | 4 | O, S |
| Myrcene | 1128 | Grassy, piney | 16 | O, MS, S |
| 3-Methyl-3-buten-1-ol | 1223 | Pine | 4 | O, MS, S |
| Unknown | 1241 | Garlic | 16 | O |
| p-Cymene | 1244 | Floral, grassy | 8 | O, S |
| Octanal | 1271 | Citrus-like | 2 | O, MS, S |
| 1-Octen-3-one | 1283 | Mushroom | 8 | O, S |
| Unknown | 1313 | Nutty, steamed rice | 32 | O |
| 6-Methyl-5-heptene-2-one | 1319 | Cooked rice, fruity | 2 | O, MS, S |
| (Z)-Rose oxide | 1329 | Floral | 8 | O, MS, S |
| DMTS | 1354 | Pickled vegetable, sulfury | 32 | O, MS, S |
| (E)-2-Octenal | 1408 | Peanut, green | 4 | O, S |
| Methional | 1432 | Cooked potato | 1024 | O, S |
| Linalool | 1526 | Floral | 32 | O, MS, S |
| (E,Z)-2,6-Nonadienal | 1573 | Cucumber | 32 | O, S |
| Unknown | 1603 | Paper board | 2 | O |
| Unknown | 1643 | Sulfury, tropical fruit | 4 | O |
| Isovaleric acid | 1657 | Smelly plant | 8 | O, S |
| (E,E)-2,4-Nonadienal | 1719 | Stale grain, metalic | 2 | O, S |
| Citronellol | 1742 | Floral, steamed rice | 4 | O, MS, S |
| Nerol | 1754 | Floral, sweet | 64 | O, MS, S |
| Geraniol | 1839 | Floral, sweet | 512 | O, MS, S |
| Nerolidol | 2013 | Metalic, sesame oil | 32 | O, MS, S |
| Guaiacol | 1866 | Medicine, bitter | 8 | O, S |
| Furaneol | 2044 | Sweet, caramel | 128 | O, S |
| Homofuraneol | 2095 | Floral, caramel | 2 | O, S |
| Unknown | 2145 | Sweet, caramel | 8 | O |
| Unknown | 2170 | Sweet, fruity | 8 | O |
a
The odorant was detected/identified by matching the standard compounds (S), mass spectrum (MS), and odor quality (O) with the reference odorant.