## 3 Results and Discussion
### Volatile Compounds
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Volatile Compounds 1** & **Aroma Description 2** & **RI 3** & **50-30** & **50-45** & **50-60** & **60-30** & **60-45** & **60-60** & **Control** \\ \hline Aldehydes & & & & & & & & & \\ Butanal & Pungent, fatty & 891 & 0.23 & 0.22 & 0.15 & 0.28 & 0.13 & 0.21 & 0.30 \\
2,3-Methylbutanal & Nutty, chocolate & 902 & 0.55 & 1.08 & 0.26 & 0.35 & 0.24 & 0.16 & 0.21 \\ Hexanal & Green, grassy & 1050 & 5.42 & 3.66 & 3.02 & 1.67 & 1.62 & 1.04 & 0.67 \\ Heptanal & Green, fatty & 1180 & 1.05 & 1.23 & 1.22 & 1.02 & 1.43 & 1.33 & 1.45 \\
2,4-Heptadien & Fatty taste, fishy smell & 1128 & 0.66 & 0.42 & 0.51 & 0.25 & 0.22 & 0.12 & 0.22 \\ Nonanal & Green, citrusy & 1374 & 0.44 & 0.40 & 0.36 & 0.21 & 0.33 & 0.29 \\
2-Octenal & Oily, nutty & 977 & 1.03 & 1.28 & 1.20 & 0.41 & 0.23 & 0.35 & 0.61 \\ Benzaldehyde & Pleasant almond, nutty & 1563 & 0.23 & 0.16 & 0.44 & 0.69 & 1.02 & 1.55 & 2.06 \\ Total aldehydes & & & 9.61 & 8.45 & 7.16 & 5.03 & 5.10 & 5.09 & 5.81 \\ \hline Ketones & & & & & & & & \\
2-Butanone & Ethereal, acetone-like & 902 & 0.66 & 1.25 & 1.03 & 1.22 & 0.39 & 0.23 & 0.28 \\
2-Heptanone & Green taste, citrus flavor & 1145 & 0.31 & 0.26 & 0.55 & 0.34 & 0.40 & 1.03 & 2.25 \\
5-Hepten-2-one, 6-methyl- & Fatty, metallic & 1025 & 0.23 & 0.19 & 0.22 & 0.24 & 0.20 & ND & ND \\
2-Nonanone & Oily, plastic & 1388 & 0.14 & 0.33 & 0.36 & ND & ND & ND & ND \\
3-Octenano & Mushroom & 983 & 0.21 & 0.17 & 0.17 & 0.12 & 0.22 & 0.14 & 0.15 \\
2-Decanone & Floral, orange, fatty & 1492 & 1.02 & 1.37 & 1.34 & 1.21 & 0.44 & 0.38 & 0.46 \\
2-Undecanone & Orange, fatty & 1201 & 0.34 & 0.41 & 0.55 & 0.21 & 0.12 & 0.16 & 0.12 \\ Acetoin & Buttery, sweet, cream & 1296 & 7.03 & 6.78 & 8.88 & 10.08 & 10.15 & 12.49 & 8.16 \\ Total ketones & & & 9.94 & 10.76 & 13.10 & 13.42 & 11.92 & 14.43 & 11.42 \\ \hline Alcohols & & & & & & & & & \\
1-Penten-3-ol & Balsam & 882 & 0.98 & 0.66 & 2.02 & 1.64 & 2.69 & 2.70 & 1.08 \\
1-Hexanol & Green, herbal & 1360 & 0.66 & 2.01 & 1.69 & 1.33 & 1.45 & 1.92 & 0.54 \\
1-Hexanol, 2-ethyl- & Citrus & 960 & 0.31 & 0.26 & 0.75 & 0.38 & 0.44 & 0.56 & 1.02 \\
1-Heptanol & Oily, balsam & 1114 & 0.21 & 0.66 & 0.82 & 0.43 & 0.18 & 0.21 & 0.22 \\
2-Nonen-1-ol & Cucumber, oily & 1206 & ND & 0.44 & 0.67 & ND & ND & ND & ND \\
1-Octen-3-ol & Mushroom, earthy & 1438 & 16.55 & 17.06 & 14.05 & 14.62 & 14.21 & 13.22 & 10.12 \\
1-Octanol & Mushroom, waxy & 1556 & ND & 0.33 & 1.01 & 0.67 & 1.35 & 1.02 & 1.44 \\ Total alcohols & & & 18.71 & 21.42 & 21.01 & 19.07 & 20.32 & 19.63 & 14.42 \\ \hline N-containing compounds & & & & & & & & \\ Trimethylamine & Ammonia, fishy, pungent & 587 & 28.42 & 28.21 & 24.68 & 25.05 & 23.95 & 16.15 & 30.25 \\
2,6-Dimethylpyrazine & Nutty, roasted, popcorn & 1309 & 4.06 & 4.55 & 3.02 & 2.55 & 4.45 & 5.03 & 7.02 \\ Trimethylpyrazine & Nutty, roasted, earthy & 1401 & 1.42 & 1.03 & 1.48 & 1.65 & 1.78 & 4.26 & 3.11 \\
2-Ethyl-3,5- & Nutty, roasted, burnt & 1438 & ND & ND & ND & ND & 0.11 & ND & 0.31 \\ dimethylpyrazine & & & 33.90 & 33.79 & 29.18 & 29.25 & 30.29 & 25.44 & 40.69 \\  & compounds & & & & & & & & \\ \hline S-containing compounds & & & & & & & & & \\ Methanethiol & Pungent, sulphury & 622 & 13.22 & 12.23 & 12.66 & 15.15 & 13.02 & 10.92 & 4.11 \\
4-Methylthiazolole & Cooked meat & 1298 & 1.02 & 2.22 & 2.09 & 1.51 & 2.67 & 2.33 & 1.02 \\
2-Methylthiazolole & Cooked meat & 1436 & ND & ND & ND & ND & ND & 0.21 & 0.33 & 0.09 \\
4,5-Dimethylthiazolole & Cooked meat & 1380 & 3.45 & 3.05 & 3.03 & 2.99 & 4.87 & 3.05 & 1.05 \\ Dimethyl trisulphide & Meaty, onion & 970 & 0.41 & 0.63 & 0.95 & 0.66 & 0.60 & 1.12 & 0.65 \\ Dimethyl tetrasulphide & Meaty & 1015 & 0.25 & 0.65 & 0.99 & 0.56 & 0.24 & 0.32 & 0.41 \\ Total S-containing compounds & & & 18.35 & 18.78 & 19.72 & 20.87 & 21.61 & 18.07 & 7.33 \\ \hline Others & & & & & & & & \\ Limone & Citrus, orange & 1190 & 1.73 & 2.02 & 1.44 & 0.54 & 0.50 & 0.56 & ND \\
2-Pentyfuran & fruity & 1229 & 4.03 & 2.65 & 4.44 & 5.27 & 6.08 & 6.22 & 10.15 \\
2-Methylfuran & fruity & 1027 & 3.52 & 1.86 & 3.65 & 5.43 & 4.08 & 10.02 & 10.11 \\ Total others & & & 9.28 & 6.53 & 9.53 & 11.24 & 10.66 & 16.80 & 20.26 \\ \hline Total peak abundance & & & 99.79 & 99.73 & 99.70 & 98.88 & 99.90 & 99.46 & 99.93 \\ \hline \hline \end{tabular}  
* 2
* 2-C  
\end{table}