## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Levels of SO\({}_{2}\)**} & \multirow{2}{*}{**Isobutyraldehyde**} & \multicolumn{3}{c}{**2-**} & \multicolumn{3}{c}{**3-**} & \multicolumn{3}{c}{**Methional**} & \multicolumn{3}{c}{**Phenylacetaldehyde**} & \multicolumn{1}{c}{**Acetaldehyde**} \\  & & **ResD** & **Mean** & **ResD** & **Mean** & **ResD** & **Mean** & **ResD** & **Mean** & **ResD** & **Mean** & **ResD** \\  & & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** & **(\%)** \\ \hline \multirow{8}{*}{Free SO\({}_{2}\)} & Control & 10.6 \({}^{\text{\,ab}}\) & 6.2 & 4.85 \({}^{\text{\,a}}\) & 9.4 & 50.5 \({}^{\text{\,a}}\) & 4.2 & 9.80 \({}^{\text{\,a}}\) & 5.5 & 31.6 \({}^{\text{\,bc}}\) & 1.2 & 49.7 \({}^{\text{\,ab}}\) & 1.8 \\  & SLB & 5.40 \({}^{\text{\,d}}\) & 46 & 1.22 \({}^{\text{\,e}}\) & 57 & 33.9 \({}^{\text{\,ef}}\) & 14 & 7.11 \({}^{\text{\,ab}}\) & 15 & 415 \({}^{\text{\,a}}\) & 1.6 & 46.0 \({}^{\text{\,bc}}\) & 11 \\  & ETDM & 9.80 \({}^{\text{\,bc}}\) & 4.7 & 3.97 \({}^{\text{\,ab}}\) & 0.7 & 49.5 \({}^{\text{\,ab}}\) & 1.8 & 10.1 \({}^{\text{\,a}}\) & 4.7 & 35.9 \({}^{\text{\,b}}\) & 2.7 & 51.5 \({}^{\text{\,a}}\) & 2.3 \\  & MAX & 9.40 \({}^{\text{\,bc}}\) & 7.6 & 3.68 \({}^{\text{\,hc}}\) & 7.9 & 35.5 \({}^{\text{\,df}}\) & 12 & 5.65 \({}^{\text{\,e}}\) & 18 & \(<\)LQ\({}^{\text{\,ef}}\) & – & 47.7 \({}^{\text{\,a}}\) & 0.1 \\  & BEC & 9.50 \({}^{\text{\,bc}}\) & 1.9 & 4.00 \({}^{\text{\,ab}}\) & 8.1 & 48.0 \({}^{\text{\,ab}}\) & 2.0 & 7.87 \({}^{\text{\,bc}}\) & 1.5 & 21.1 \({}^{\text{\,d}}\) & 14 & 51.0 \({}^{\text{\,abc}}\) & 2.6 \\  & SXA & 8.80 \({}^{\text{\,bc}}\) & 11 & 2.53 \({}^{\text{\,d}}\) & 14 & 35.8 \({}^{\text{\,de}}\) & 7.6 & 6.19 \({}^{\text{\,de}}\) & 8.3 & \(<\)LQ\({}^{\text{\,ef}}\) & – & 44.8 \({}^{\text{\,cd}}\) & 3.1 \\  & SXAW & 12.5 \({}^{\text{\,a}}\) & 8.8 & 3.15 & 22 & 30.1 \({}^{\text{\,f}}\) & 3.0 & 6.79 \({}^{\text{\,de}}\) & 0.9 & \(<\)LQ\({}^{\text{\,ef}}\) & – & 43.5 \({}^{\text{\,cd}}\) & 0.9 \\  & DOW & 8.30 \({}^{\text{\,c}}\) & 4.1 & 2.91 \({}^{\text{\,cd}}\) & 5.7 & 40.0 \({}^{\text{\,cd}}\) & 0.1 & 6.83 \({}^{\text{\,de}}\) & 3.7 & 25.5 \({}^{\text{\,cd}}\) & 2.4 & 41.0 \({}^{\text{\,d}}\) & 1.0 \\  & IRA & 8.90 \({}^{\text{\,bc}}\) & 0.6 & 3.44 \({}^{\text{\,bc}}\) & 6.0 & 44.6 \({}^{\text{\,bc}}\) & 3.8 & 8.38 \({}^{\text{\,b}}\) & 5.0 & 25.8 \({}^{\text{\,cd}}\) & 5.7 & 44.0 \({}^{\text{\,cd}}\) & 1.1 \\ \hline \multicolumn{2}{c}{\(p\)-value (native SO\({}_{2}\))} & 0.005 & \multicolumn{3}{c}{\(<\)0.001} & \multicolumn{3}{c}{\(<\)0.001} & \multicolumn{3}{c}{\(<\)0.001} & \multicolumn{3}{c}{\(<\)0.001} & \multicolumn{3}{c}{\(<\)0.004} \\ \hline \multirow{8}{*}{Free SO\({}_{2}\)} & Control & 10.0 \({}^{\text{\,BC}}\) & 2.3 & 4.71 \({}^{\text{\,A}}\) & 14 & 47.5 \({}^{\text{\,A}}\) & 2.2 & 9.21 \({}^{\text{\,B}}\) & 1.7 & 28.5 \({}^{\text{\,C}}\) & 0.5 & 48.5 \({}^{\text{\,A}}\) & 6.5 \\  & SLB & 4.80 \({}^{\text{\,D}}\) & 50 & 1.31 \({}^{\text{\,C}}\) & 57 & 34.8 \({}^{\text{\,C}}\) & 26 & 7.60 \({}^{\text{\,C}}\) & 6.0 & 363 \({}^{\text{\,A}}\) & 1.5 & 40.1 \({}^{\text{\,C}}\) & 8.3 \\  & ETDM & 10.8 \({}^{\text{\,AB}}\) & 0.8 & 4.74 \({}^{\text{\,A}}\) & 0.4 & 47.2 \({}^{\text{\,AB}}\) & 1.4 & 11.2 \({}^{\text{\,A}}\) & 7.9 & 41.6 \({}^{\text{\,B}}\) & 3.1 & 47.5 \({}^{\text{\,A}}\) & 3.6 \\  & MAX & 9.30 \({}^{\text{\,bc}}\) & 4.5 & 4.67 \({}^{\text{\,A}}\) & 1.5 & 39.4 \({}^{\text{\,dc}}\) & 4.0 & 6.40 \({}^{\text{\,CD}}\) & 2.3 & \(<\) LQ\({}^{\text{\,E}}\) & – & 45.7 \({}^{\text{\,A}}\) & 0.3 \\  & Free SO\({}_{2}\) & 10.1 & \multicolumn{3}{c}{} & 1.3 & 4.63 \({}^{\text{\,A}}\) & 12 & 47.1 \({}^{\text{\,AB}}\) & 1.1 & 7.50 \({}^{\text{\,C}}\) & 1.5 & 22.9 \({}^{\text{\,CD}}\) & 3.1 & 45.3 \({}^{\text{\,A}}\) & 1.7 \\  & Total SO\({}_{2}\) & SXA & 8.90 \({}^{\text{\,BC}}\) & 8.6 & 3.32 \({}^{\text{\,B}}\) & 8.8 & 32.8 \({}^{\text{\,CD}}\) & 11 & 6.10 \({}  
In general, the reproducibility of the elimination process was satisfactory.