## 3 Results
### Results of Analytical Methods
#### 3.3.3 Results of Measurement of Water-Soluble Solid Content, pH Value, and Colour  
For the Bonita (white-fleshed) sweet potato samples, the water-soluble dry matter content of the untreated sample measured in its fresh state (10.97 \({}^{\circ}\)Brix) was higher than that of the treated samples (9.60-10.07 \({}^{\circ}\)Brix) (Table 4). During the storage period, a decline in the water-soluble dry matter content was observed (9.40, 9.30, 9.67, and 9.33 \({}^{\circ}\)Brix), except for the control sample, where an increase was detected (11.37 \({}^{\circ}\)Brix). Notably, no statistically significant differences were found in the dry matter contents measured among the treated samples. The treatment had a significant effect (F(4;10) = 138.084; \(p<0.001\)), and the storage time had a significant effect (F(1;10) = 7.412; \(p<0.05\)), and their interaction was also significant (F(4;20) = 10.857; \(p<0.001\)). For the Covington (dark, orange-fleshed) sweet potato samples, the water-soluble dry matter content of the untreated sample in its fresh state (9.70 \({}^{\circ}\)Brix) was higher than that of the treated samples (8.40-8.53 \({}^{\circ}\)Brix). During the storage period, no statistically significant differences were detected in the measured dry matter content values. The treatment had a significant effect (F(4;10) = 100.462; \(p<0.001\)), but storage time had no significant effect (F(1;10) = 0.010; \(p=0.429\)), while the interaction of treatment and storage time was significant (F(4;20) = 2.882; \(p<0.05\))  
In summary, the findings indicate that, in the fresh state, the treatments led to a modest reduction in water-soluble dry matter content for both sweet potato varieties. During the storage period, the Covington samples were not affected regarding their water-soluble dry matter content. Higher total soluble solids were detected in orange cultivars (8.52-9.72 \({}^{\circ}\)BRIX) than in white (5.57 \({}^{\circ}\)BRIX) sweet potato tubers [44]. \begin{table}
\begin{tabular}{c c c c c c c} \hline  & \multicolumn{2}{c}{**Control**} & \multicolumn{2}{c}{**AP**} & \multicolumn{2}{c}{**CP**} & \multicolumn{2}{c}{**AA**} & \multicolumn{2}{c}{**CA**} \\ \hline \multicolumn{6}{c}{water soluble solid content (\({}^{\circ}\)Brix)} \\ \hline \multirow{3}{*}{Bonita} & Day 0. & 10.97 \(\pm\) 0.15 \({}^{\text{Ba}}\) & 9.60 \(\pm\) 0.10 \({}^{\text{A}}\) & 9.97 \(\pm\) 0.25 \({}^{\text{Ab}}\) & 9.77 \(\pm\) 0.25 \({}^{\text{A}}\) & 10.07 \(\pm\) 0.06 \({}^{\text{Ab}}\) \\  & Day 7. & 11.37 \(\pm\) 0.08 \({}^{\text{Db}}\) & 9.40 \(\pm\) 0.17 \({}^{\text{A}}\) & 9.30 \(\pm\) 0.06 \({}^{\text{Aa}}\) & 9.67 \(\pm\) 0.18 \({}^{\text{B}}\) & 9.93 \(\pm\) 0.09 \({}^{\text{Ca}}\) \\  & Day 0. & 9.70 \(\pm\) 0.17 \({}^{\text{B}}\) & 8.40 \(\pm\) 0.17 \({}^{\text{A}}\) & 8.43 \(\pm\) 0.12 \({}^{\text{A}}\) & 8.43 \(\pm\) 0.12 \({}^{\text{A}}\) & 8.53 \(\pm\) 0.06 \({}^{\text{A}}\) \\  & Day 5. & 9.53 \(\pm\) 0.21 \({}^{\text{C}}\) & 8.60 \(\pm\) 0.06 \({}^{\text{AB}}\) & 8.30 \(\pm\) 0.17 \({}^{\text{A}}\) & 8.57 \(\pm\) 0.11 \({}^{\text{AB}}\) & 8.68 \(\pm\) 0.12 \({}^{\text{B}}\) \\ \hline \multirow{3}{*}{Bonita} & Day 0. & 5.83 \(\pm\) 0.01 \({}^{\text{Da}}\) & 5.81 \(\pm\) 0.01 \({}^{\text{Ca}}\) & 5.82 \(\pm\) 0.01 \({}^{\text{CDa}}\) & 5.36 \(\pm\) 0.01 \({}^{\text{DB}}\) & 4.45 \(\pm\) 0.01 \({}^{\text{Ab}}\) \\  & Day 7. & 5.92 \(\pm\) 0.01 \({}^{\text{Db}}\) & 5.85 \(\pm\) 0.01 \({}^{\text{Cb}}\) & 5.90 \(\pm\) 0.01 \({}^{\text{Db}}\) & 5.16 \(\pm\) 0.01 \({}^{\text{Ba}}\) & 4.25 \(\pm\) 0.02 \({}^{\text{Aa}}\) \\  & Day 0. & 5.73 \(\pm\) 0.01 \({}^{\text{Ea}}\) & 5.31 \(\pm\) 0.01 \({}^{\text{CDa}}\) & 5.69 \(\pm\) 0.01 \({}^{\text{Da}}\) & 4.85 \(\pm\) 0.01 \({}^{\text{DB}}\) & 4.42 \(\pm\) 0.01 \({}^{\text{Ab}}\) \\  & Day 5. & 5.96 \(\pm\) 0.01 \({}^{\text{Eb}}\) & 5.92 \(\pm\) 0.01 \({}^{\text{Db}}\) & 5.72 \(\pm\) 0.01 \({}^{\text{CBb}}\) & 4.65 \(\pm\) 0.01 \({}^{\text{Ba}}\) & 4.11 \(\pm\) 0.01 \({}^{\text{Aa}}\) \\ \hline \end{tabular}
\end{table}