No. | Compounds | Concentration (μg kg−1) | Threshold in starch (μg kg−1) | Odour activity values (OAVs)c | ||||
---|---|---|---|---|---|---|---|---|
CB | BF24 | BF48 | CB | BF24 | BF48 | |||
1 | Acetic acid | 300 ± 2.0c | 480 ± 2.0b | 510 ± 2.0a | 31,140 | < 1 | < 1 | < 1 |
2 | 2,3-Butanedione (diacetyl) | 710 ± 5.1c | 11,800 ± 12.0b | 12,950 ± 15.5a | 6.5 | 109 | 1815 | 1992 |
3 | 2/3-Methyl butanal | 164 ± 2.1c | 321 ± 2.1b | 434 ± 2.0a | 32a | 5 | 10 | 14 |
4 | Butanoic acid | 113 ± 1.0c | 201 ± 1.0b | 317 ± 1.0a | 100a | 1 | 2 | 3 |
5 | Acetoin | 1140 ± 4.5c | 1245 ± 5.0b | 1276 ± 4.0a | Nf | nd | nd | nd |
6 | 3-Methyl butanol | 647 ± 3.1c | 1126 ± 7.8b | 1364 ± 10.0a | 102 | 6 | 11 | 13 |
7 | Furfural | 101 ± 1.0b | 126 ± 1.0a | 124 ± 1.0a | Nf | nd | nd | nd |
8 | 2-Methylpyrazine | 30 ± 0.2c | 54 ± 0.2b | 76 ± 0.2a | Nf | nd | nd | nd |
9 | 3-Methylbutanoic acid | 64 ± 1.0c | 276 ± 2.1b | 314 ± 2.0a | 24 | 3 | 12 | 13 |
10 | Methional | 16 ± 0.1c | 24 ± 0.1b | 43 ± 0.1a | 0.27 | 59 | 89 | 160 |
11 | 2-Acetyl-1-pyrroline | 17 ± 0.1ab | 19 ± 0.1a | 18 ± 0.1a | 0.0073a | 2329 | 2603 | 2466 |
12 | Benzaldehyde | 174 ± 3.0c | 920 ± 4.5b | 1121 ± 6.0a | 350 | < 1 | 3 | 3 |
13 | 5-Methyl-2-furanmethanol | 46 ± 0.1c | 52 ± 0.1b | 58 ± 0.1a | 11.9b | 4 | 4 | 5 |
14 | (Z)-4-Heptenal | 51 ± 0.1c | 135 ± 0.2b | 234 ± 0.2a | 3 | 17 | 45 | 78 |
15 | Acetyl pyrazine | 171 ± 1.0c | 186 ± 1.0b | 193 ± 1.0a | nf | nd | nd | nd |
16 | 4-Hydroxy-2,5-dimethyl-3(2H)-furanone | 234 ± 2.0c | 347 ± 2.1b | 453 ± 3.0a | 13 b | 18 | 27 | 35 |
17 | Benzyl alcohol | 115 ± 1.0c | 176 ± 2.0b | 182 ± 2.1a | nf | nd | nd | nd |
18 | Phenyl acetaldehyde | 15 ± 0.0b | 18 ± 0.1a | 17 ± 0.1a | 28b | < 1 | < 1 | < 1 |
19 | 2-Phenyl ethanol | 1101 ± 5.0c | 1134 ± 5.0b | 1512 ± 5.0a | 125b | 9 | 9 | 12 |
20 | Octanoic acid | 87 ± 2.1c | 102 ± 2.0b | 116 ± 2.0a | Nf | nd | nd | nd |
21 | 4-Vinyl-2-methoxyphenol | 146 ± 2.0c | 305 ± 2.1b | 512 ± 4.0a | 18b | 8 | 17 | 28 |
22 | Vanillin | 56 ± 0.1c | 73 ± 0.1b | 95 ± 0.1a | 4.6b | 12 | 16 | 21 |