## 3 Results and Discussion
### Quantitation of Odor-Active Compounds and OVA Calculation
**} & **Time** & **Odor-Active** & **The Range of** & **Average** & **OTs** & **Literature The Range of** & **Average** & **Identification** \\  & **(min)** & **R1** & **Compounds** & **Concentration (\(\upmu\)g/kg)** & **(\(\upmu\)g/kg)** & **(\(\upmu\)g/kg)** & **a** & **OAV** & **OAV** & **Identification** \\ \hline
1 & 27.67 1381 & (_E_)-\(\beta\)-Damascenone & 58.86–238.97 & 123.08 \(\pm\) 46.69 & 0.002 & [1,2] & 29427.88– & 61538.79 \(\upmu\)g & & \\
2 & 31.93 1485 & \(\beta\)-Ionone & 244.72–409.08 & 292.96 \(\pm\) 43.00 & 0.007 & [3] & 34906.64– & 41851.78 \(\upmu\)g & MS/RI/Odor/STD \\
3 & 29.94 1435 & Dihydro-\(\beta\)-ionone & 12.39–42.08 & 24.86 \(\pm\) 7.32 & 0.001 & [4] & 12385.95– & 24865.37 \(\upmu\)g & MS/RI/Odor/STD \\  & 4 & 15.13 1105 & Linalo & 900.49–3196.25 & 696.93 & 6 & [5] & 150.08–532.71 & 116.16 \(\upmu\)g/T & MS/RI/Odor/STD \\
5 & 29.51 1425 & a-Ionone & 38.70–113.52 & 67.47 \(\pm\) 20.43 & 0.4 & [6] & 96.75–283.81 & 51.07 \(\upmu\)g & MS/RI/Odor/STD \\
6 & 22.19 1261 & Geraniol & 79.47–1324.51 & 523.28 \(\pm\) 459.73 & 3.2 & [3] & 24.83–413.91 & 143.67 \(\upmu\)g & MS/RI/Odor/STD \\
7 & 15.75 1119 & Phenylethyl alcohol & 205.78–773.33 & 362.70 \(\pm\) 167.55 & 4.9 & [7] & 42.00–157.82 & 74.02 \(\pm\) 34.19 & MS/RI/Odor/STD \\
8 & 22.35 1264 & (_E_)-2-Decenal & 0.00–147.92 & 25.56 \(\pm\) 52.14 & 0.4 & [8] & 0.00–369.80 \(\upmu\)g & MS/RI/Odor/STD \\
9 & 19.29 199 & Methyl salicate & 212.96–1418.74 & 786.55 \(\pm\) 409.55 & 16 & [9] & 13.31–88.67 \(\upmu\)g & +0.16 \(\upmu\)g & MS/RI/Odor/STD \\
10 & 12.43 106 & Benzeneacetaldehyde & 0.00–680.02 & 259.48 \(\pm\) 204.12 & 6.3 & [10] & 10.00–107.94 \(\upmu\)g & +41.19 \(\upmu\)g & +23.40 \(\upmu\)g & MS/RI/Odor/STD \\
11 & 35.08 1566 & (_E_)-NERolid & 0.00–284.47 & 20.377 \(\pm\) 79.16 & 10 & [11] & 0.00–28.45 & 20.74 \(\pm\) 7.92 \(\upmu\)g & MS/RI/Odor/STD \\
12 & 14.39 1089 & Linalo oxide II & 8853.47–1853.65 & 1113.75 \(\pm\) & 60 & [10] & 11.22–30.89 & 18.56 \(\pm\) 5.05 & MS/RI/Odor/STD \\
13 & 9.69 982 & 1-Octen-3-ol & 0.00–178.23 & 23.52 \(\pm\) 49.27 & 1.5 & [1] & 0.00–118.82 & 15.68 \(\pm\) 32.84 & MS/RI/Odor/STD \\
14 & 25.26 1291 & 1-Methyl-naphthalene & 0.00–298.42 & 86.97 \(\pm\) 94.37 & 7.5 & [1] & 0.00–39.79 \(\upmu\)g & 11.60 \(\upmu\)g & +2.25 \(\upmu\)g & MS/RI/Odor/STD \\
15 & 20.38 122 & \(\upmu\)-Cyclocitral & 20.20–123.52 & 57.92 \(\pm\) 33.65 & [12] & 0.00–24.70 & 11.58 \(\pm\) 7.13 \(\upmu\)g & MS/RI/Odor/STD \\
16 & 3.845 800 & Hexanal & 23.45–164.09 & 77.13 \(\pm\) 41.29 & 10 & [10] & 23.66–14.17 \(\upmu\)g & 7.71 \(\pm\) 4.13 \(\upmu\)g & MS/RI/Odor/STD \\
17 & 10.90 592 & 2.75–164.99 & 64.23 \(\pm\) 41.531 & 6 & [13] & 2.88–116.6 \(\upmu\)g & 7.02 \(\pm\) 2.55 & MS/RI/Odor/STD \\
18 & 13.64 1072 & Linaloalo oxide I & 352.21–1000.30 & 509.49 \(\pm\) 170.87 & 100 & [10] & 3.52–10.00 & 5.09 \(\pm\) 1.71 \(\upmu\)g & MS/RI/Odor/STD \\
19 & 11.56 1027 & D-Limonene & 0.00–82.23 & 34.64 \(\pm\) 22.01 & 10 & [6] & 0.00–82.2 \(\upmu\)g & 3.46 \(\pm\) 2.20 & MS/RI/Odor/STD \\
10 & 19.13 1196 & _a_-Teripenol & 0.00–113.30 & 52.36 \(\pm\) 51.11 & 20.8 \(\pm\) 20.18 & [4] & 0.00–54.5 \(\upmu\)g & 2.52 \(\pm\) 1.69 \(\upmu\)g & MS/RI/Odor/STD \\
21 & 30.63 1453 & Geranyl acetone &greater than 1, and indicated that these compounds played an important role in the aroma profile of SBT. Among them, alcohols, ketones, hydrocarbons, and aldehydes occupied most of the components, and the results of this study were consistent with those previously reported [8]. However, the OAVs calculation showed that an odor-active compound with higher content did not mean a larger OAV or vice versa. For example, dihydro-\(\beta\)-ionone (\(24.86\pm 7.32\)\(\mathrm{\SIUnitSymbolMicro g}/\mathrm{kg}\)) was present at low concentrations in SBT samples, but its OAV was 24856.37 (its threshold was 0.001 \(\mathrm{\SIUnitSymbolMicro g}/\mathrm{kg}\) in water). By contrast, epoxylinalo (973.71 \(\pm\) 371.22 \(\mathrm{\SIUnitSymbolMicro g}/\mathrm{kg}\)) was present at a relatively high concentration in SBT samples, but its OAV was only 0.32.