Odor quality, odor threshold, VIP and correlation coefficient with aroma of different HPT varietiesb,c.
| No. | Name | VIP | Aroma | OTa | OAV | Odor quality | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| SS | MC | MT | AC | YF | ||||||
| 1 | l-α-Terpineol | 1.33 | 0.55 | 330.00 | 4.71 | 5.57 | 3.25 | 23.21 | 2.97 | Floral, sweet |
| 2 | Nonanal | 1.07 | 0.85 | 1.10 | 9211.00 | 4169.87 | 10 523.86 | 3701.72 | 4025.15 | Floral, lemon-like, fatty |
| 5 | Benzeneacetaldehyde | 1.23 | 0.78 | 4.00 | 1060.50 | 1079.79 | 545.22 | 2236.46 | 757.09 | Rose-like, cherry-like |
| 3 | Hexanal | 1.32 | 0.68 | 4.50 | 790.77 | 369.34 | 2132.10 | 1168.67 | 162.80 | Grassy, fatty |
| 4 | Caryophyllene | 2.49 | 0.51 | 64.00 | 1022.85 | 41.40 | 298.19 | 98.71 | 63.21 | Woody, acridity |
| 6 | Phenylethyl alcohol | 4.69 | 0.78 | 390.00 | 67.06 | 663.45 | 597.87 | 262.62 | 304.51 | Fruity, hyacinth-like, woody |
| 7 | Citronellol | 1.05 | 0.52 | 40.00 | 28.72 | 9.62 | 185.21 | 12.11 | 34.60 | Rose-like |
| 8 | o-Cymene | 1.81 | 0.50 | 11.40 | 2856.32 | 0.00 | 855.86 | 572.61 | 0.00 | Grassy, medicinal |
| 9 | 3,5-Octadien-2-one | 1.05 | 0.29 | 115.39 | 0.00 | 0.00 | 0.00 | 35.26 | 0.00 | Fruity, fatty, and chestnut |
| 10 | Linalool | 1.48 | 0.54 | 0.22 | 0.00 | 13 053.43 | 10 028.98 | 48 628.89 | 11 974.95 | Lily-like, sweet, woody |
| 11 | (−)-cis-Rose oxide | 1.39 | 0.35 | 0.50 | 0.00 | 0.00 | 23 399.03 | 0.00 | 0.00 | Rose-like, fruity, grassy |
| 12 | Nonanoic acid | 2.28 | 0.33 | 3000.00 | 0.00 | 13.33 | 0.00 | 0.00 | 0.00 | Musty, pungent |
| 13 | Geranic acid | 1.28 | 0.35 | 40.00 | 0.00 | 0.00 | 0.00 | 0.00 | 140.82 | Grassy |
| 14 | Phellandral | 1.02 | 0.42 | 3.00 | 3231.27 | 0.00 | 0.00 | 923.53 | 0.00 | Grassy, fatty |
| 15 | 4,7-Dimethylbenzofuran | 2.60 | 0.54 | — | — | — | — | — | — | Unknown |
| 16 | Beta-patchoulene | 2.23 | 0.55 | — | — | — | — | — | — | Unknown |
| 17 | 1-Methyl-5-prop-1-en-2-ylcyclohexene | 1.44 | 0.56 | — | — | — | — | — | — | Unknown |
| 18 | Benzoic acid, 2-ethylhexyl ester | 1.32 | 0.62 | — | — | — | — | — | — | Unknown |
| 19 | 2-Octyl benzoate | 1.19 | 0.33 | — | — | — | — | — | — | Unknown |
| 20 | 6,10,14-Trimethylpentadecan-2-one | 1.12 | 0.87 | — | — | — | — | — | — | Unknown |
| 21 | 2′,4′-Dimethylacetophenone | 1.08 | 0.33 | — | — | — | — | — | — | Unknown |
| 22 | (−)-Tricyclo[6.2.1.0(4,11)]undec-5-ene, 1,5,9,9-tetramethyl-(isocaryophyllene-I1) | 1.79 | 0.34 | — | — | — | — | — | — | Unknown |
a
OT, odor thresholds in water. All the odor thresholds and odor quality were obtained from: ‘Odour & Flavour Detection thresholds in water (in parts per billion, l μg L−1)’ (https://leffingwell.com/chirality/acyclics.htm); refs. 40–48.
b
— No threshold for the compound in water was found.
c
HPT, herbaceous peony tea; OAV, odor activity value; VIP, variable importance projection.