## 3 Results and Discussion
### Analysis of Baijiu Samples  
The optimized HS-SPME-GC\(\times\)GC-TOFMS method was applied to different types of Baijiu samples to demonstrate its effectiveness. The mean concentration values of the 119 volatile compounds in Baijiu samples are presented in Table 3. The lowest concentration of compounds detected was \(\gamma\)-decalactone in the Wuliangye sample, which was only 0.28 \(\mathrm{\SIUnitSymbolMicro g}\)/L. The 3-methylbutyraldehyde had the highest concentration in the light aroma type and soy sauce aroma type Baijiu, which was 82,260.03 \(\mathrm{\SIUnitSymbolMicro g}\)/L in the Moutai sample. This method achieved the simultaneous quantification of different chemicals and different concentrations of compounds in a complex matrix. ### Analysis of Baijiu Samples  
The optimized HS-SPME-GC\(\times\)GC-TOFMS method was applied to different types of Baijiu samples to demonstrate its effectiveness. The mean concentration values of the 119 volatile compounds in Baijiu samples are presented in Table 3. The lowest concentration of compounds detected was \(\gamma\)-decalactone in the Wuliangye sample, which was only 0.28 \(\mathrm{\SIUnitSymbolMicro g}\)/L. The 3-methylbutyraldehyde had the highest concentration in the light aroma type and soy sauce aroma type Baijiu, which was 82,260.03 \(\mathrm{\SIUnitSymbolMicro g}\)/L in the Moutai sample. This method achieved the simultaneous quantification of different chemicals and different concentrations of compounds in a complex matrix. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Volatile Compounds**} & \multirow{2}{*}{\begin{tabular}{c} **Linear Range** \\ **(\(\mathrm{\SIUnitSymbolMicro g}\)/L)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **R2** \\ **(\(\mathrm{\SIUnitSymbolMicro g}\)/L)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **LOD** \\ **(\(\mathrm{\SIUnitSymbolMicro g}\)/L)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **LOQ** \\ **(\(\mathrm{\SIUnitSymbolMicro g}\)/L)** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Intraday** \\ **Precision** \\ **(\%)** \\ \end{tabular} } & \multirow{2}{*}{\
\begin{tabular}{c} **Interday** \\ **Precision** \\ **(\%)** \\ \end{tabular} } & \multirow{2}{*}{
\begin{tabular}{c} **Recovery** \\ **(\%)** \\ \end{tabular} } \\ \hline \(\alpha\)-Cedrene & 3.49–1785.27 & 0.9974 & 15.24 & 50.81 & 6.77 & 2.81 & 98.43 \\ Caryophyllene & 0.42–108.51 & 0.9957 & 22.90 & 76.33 & 9.34 & 5.04 & 102.94 \\ Rosoxide & 0.39–100.35 & 0.9974 & 3.16 & 10.54 & 4.77 & 5.21 & 100.54 \\ Citronello & 0.31–160.93 & 0.9959 & 12.64 & 42.14 & 1.28 & 9.19 & 105.53 \\ Geraniol & 0.15–77.84 & 0.9939 & 64.43 & 214.78 & 2.47 & 8.60 & 95.81 \\ Irisone & 0.03–17.47 & 0.9966 & 15.55 & 51.84 & 3.46 & 1.82 & 110.83 \\ Geranylacetone & 0.51–130.62 & 0.9912 & 1.06 & 3.54 & 4.73 & 3.82 & 98.84 \\ \(\beta\)-Cyclocitral & 0.49–251.81 & 0.9949 & 14.85 & 49.50 & 6.64 & 6.89 & 107.52 \\ Cineole & 0.72–367.11 & 0.9983 & 79.35 & 264.50 & 4.29 & 0.57 & 103.62 \\ Terpinen-4-ol & 0.39–199.60 & 0.9961 & 24.68 & 82.27 & 2.92 & 3.64 & 93.41 \\ Cedrol & 1.10–560.10 & 0.9994 & 7.49 & 24.98 & 4.54 & 9.51 & 100.04 \\ Isophorone & 0.73–375.64 & 0.9903 & 4.70 & 15.66 & 4.73 & 6.36 & 96.71 \\ Linalool & 0.63–320.22 & 0.999 & 1.82 & 6.07 & 8.36 & 4.05 & 100.05 \\
**Lactones** & & & & & & & \\ \(\gamma\)-Decalactone & 0.26–133.12 & 0.9951 & 19.67 & 65.58 & 4.08 & 8.01 & 97.61 \\ \(\gamma\)-Dodecalactone & 4.72–604.68 & 0.99 & 22.66 & 75.54 & 0.14 & 2.99 & 102.34 \\ \(\gamma\)-Nonolactone & 5.32–2722.23 & 0.9975 & 89.68 & 298.93 & 4.16 & 8.72 & 100.66 \\ \(\gamma\)-Hexalactone & 3.53–112.25 & 0.9909 & 1.77 & 5.90 & 5.31 & 1.56 & 103.76 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: _Cont._  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Volatile Compounds**} & \multirow{2}{*}{**Odor Thresholds**} & \multirow{2}{*}{ \begin{tabular}{c} **Fenjiu** \\ **Concentration** \\ \end{tabular}  } & \multirow{2}{*}{ \begin{tabular}{c} **Wuliangye** \\ **Concentration** \\ \end{tabular}