Table 1.
Odour-active compounds, their retention indices and FD factors on a DB-FFAP capillary, and their odour qualities as identified in three Pinus sylvestris L. samples.
| No | Substance | RI DB-FFAP | Odour quality | FD DB-FFAP | Identificationa | ||
|---|---|---|---|---|---|---|---|
| Sample 1 | Sample 2 | Sample 3 | |||||
| 1 | Pentanal | 1000 | green, grassy | 9 | 27 | 1 | RI, O, RC |
| 2 | α-Pinene | 1032 | woody, resinous | 729 | 729 | 243 | MS, RI, O, RC |
| 3 | Hexanal | 1088 | green, grassy | 243 | 243 | 27 | MS, RI, O, RC |
| 4 | Octanal | 1288 | citrusy | 9 | 243 | 27 | MS, RI, O, RC |
| 5 | 1-Octene-3-one | 1300 | mushroom-like | 9 | 27 | 27 | MS, RI, O, RC |
| 6 | Nonanal | 1392 | citrusy | 9 | 27 | 9 | MS, RI, O, RC |
| 7 | (E)-Oct-2-enal | 1431 | fatty | 27 | 27 | 27 | MS, RI, O, RC |
| 8 | Acetic acid | 1450 | vinegar-like | 9 | 81 | 27 | RI, O, RC |
| 9 | (Z)-Non-2-enal | 1493 | fatty | 81 | n.d. | 27 | RI,O |
| 10 | (E)-Non-2-enal | 1526 | fatty | 243 | 243 | 243 | MS, RI, O, RC |
| 11 | Linalool | 1543 | citrusy | 243 | 27 | n.d. | MS, RI, O, RC |
| 12 | Fenchol | 1580 | mouldy | 9 | n.d. | 9 | MS, RI, O, RC |
| 13 | (E,Z)-Nona-2,6-dienal | 1586 | cucumber-like | n.d. | 27 | 27 | RI, O, RC |
| 14 | (E)-Dec-2-enal | 1610 | fatty | 243 | 243 | n.d. | RI, O, RC |
| 15 | Butanoic acid | 1629 | cheesy | 81 | 27 | 27 | MS, RI, O, RC |
| 16 | 2-Butyl-2-octenal | 1643 | sweetish, metallic, citrus | n.d. | 9 | 9 | MS |
| 17 | 3-Methylbutanoic acid | 1677 | cheesy | 9 | 3 | 9 | RI, O, RC |
| 18 | (E,E) -Nona-2,4-dienal | 1700 | fatty | 729 | 729 | 243 | MS, RI, O, RC |
| 19 | Borneol | 1705 | mouldy | 9 | n.d. | 27 | MS, RI, O, RC |
| 20 | unknown | 1718 | minty, fresh | 27 | 81 | 9 | |
| 21 | Pentanoic acid | 1736 | cheesy | 27 | 729 | 27 | MS, RI, O, RC |
| 22 | (E,E) -Deca-2,4-dienal | 1810 | fatty | 729 | n.d. | 81 | MS, RI, O, RC |
| 23 | Hexanoic acid | 1848 | spit-like, animal-like, plastic-like | 27 | 81 | 81 | MS, RI, O, RC |
| 24 | 5-Butyloxolan-2-one (γ-Octalactone) | 1917 | sweetish, coconut-like | n.d. | 81 | 27 | MS, RI, O, RC |
| 25 | Heptanoic acid | 1942 | pepperoni-like, plastic-like | 729 | 81 | 81 | MS, RI, O, RC |
| 26 | 6-Propyloxan-2-one ( δ -Octalactone) | 1984 | coconut-like | 729 | 243 | 243 | MS, RI, O, RC |
| 27 | 5-Pentyloxolan-2-one (γ-Nonalactone) | 2037 | peach-like | 81 | 243 | 81 | MS, RI, O, RC |
| 28 | (E,Z,Z) -Trideca-2,4,7-trienal | 2058 | fruity, blood-like, metallic | 9 | 729 | 27 | RI, O, RC |
| 29 | 4-Methylphenol (p-Cresol) | 2089 | horse-like | 27 | 3 | 27 | MS, RI, O, RC |
| 30 | 6-Butyloxan-2-one (δ-Nonalactone) | 2089 | sweet, coconut-like | 243 | 81 | n.d. | RI, O, RC |
| 31 | 5-Hexyloxolan-2-one (γ-Decalactone) | 2156 | peach-like | 9 | 1 | 9 | RI, O, RC |
| 32 | Nonanoic acid | 2164 | leather-like, artificial, soapy | n.d. | 243 | 27 | RI, O, RC |
| 33 | Sotolone | 2212 | savoury | 243 | 27 | 81 | RI, O, RC |
| 34 | α-Bisabolol | 2255 | balsamic, pepper-like | 9 | 729 | 243 | MS, RI, O, RC |
| 35 | unknown | 2300 | leather-like | 81 | 27 | n.d. | |
| 36 | 5-Octyloxolan-2-one (γ-Dodecalactone) | 2388 | peach-like | 9 | 9 | 9 | RI, O, RC |
| 37 | Dodecanoic acid | 2489 | perfume-like, soapy | 9 | 9 | 27 | RI, O, RC |
| 38 | unknown | 2538 | rubber-like | n.d. | 27 | 243 | |
| 39 | Phenylacetic acid | 2567 | honey-like | 729 | 729 | 729 | RI, O, RC |
| 40 | Vanillin | 2594 | vanilla-like | 729 | 729 | 729 | MS, RI, O, RC |
| 41 | 3-Phenylpropanoic acid | 2640 | vomit-like, fruity | 729 | 243 | 243 | RI, O, RC |
| 42 | unknown | 2878 | androstenone-like, perfume-like | 81 | 81 | 9 | |
| 43 | unknown | 2927 | androstenone-like, perfume-like | 27 | 243 | 243 | |
| 44 | Thymoquinone | 3100 | pencil-like | 729 | n.d. | 81 | MS, RI, O, RC |
The most potent odorants are indicated in bold print.
aIdentification methods: MS: mass spectrum, RI: retention indices, O: odour quality, RC: comparison of all data with reference compounds; n.d. not detected by means of olfactory detection in the most concentrated sample referring to FD 1.