Valorization of Glycine max (Soybean) Seed Waste: Optimization of the Microwave-Assisted Extraction (MAE) and Characterization of Polyphenols from Soybean Meal Using Response Surface Methodology (RSM)
Table 4
Matrix of coded and real variables with responses obtained according to experimental conditions and predicted values.
Trials
Matrix of real and coded variables
Responses
TPC (mg GAE/g)
TFC (mg CE/g)
Solvent
Power
Time
Exp
Pre
Exp
Pre
1
70 (−1)
150 (−1)
2 (−1)
6.87 ± 0.14
6.94
4.46 ± 0.05
4.25
2
100 (1)
150 (−1)
2 (−1)
3.66 ± 0.10
3.87
3.31 ± 0.07
3.20
3
70 (−1)
240 (1)
2 (−1)
4.87 ± 0.09
5.10
2.34 ± 0.02
2.61
4
100 (1)
240 (1)
2 (−1)
1.96 ± 0.17
1.67
1.43 ± 0.05
1.29
5
70 (−1)
150 (−1)
8 (1)
2.09 ± 0.15
2.83
1.25 ± 0.15
1.45
6
100 (1)
150 (−1)
8 (1)
4.24 ± 0.18
4.46
2.11 ± 0.05
1.91
7
70 (−1)
240 (1)
8 (1)
1.75 ± 0.02
1.99
1.70 ± 0.07
1.88
8
100 (1)
240 (1)
8 (1)
2.89 ± 0.09
3.26
1.79 ± 0.05
2.07
9
59.77 (−1,68)
195 (0)
5 (0)
6.21 ± 0.11
5.66
2.65 ± 0.02
2.40
10
110.22 (1.68)
195 (0)
5 (0)
4.24 ± 0.06
4.14
1.55 ± 0.07
1.67
11
85 (0)
119.31 (−1.68)
5 (0)
5.80 ± 0.14
5.27
3.21 ± 0.10
3.42
12
85 (0)
270.68 (1.68)
5 (0)
2.83 ± 0.11
2.71
2.51 ± 0.10
2.18
13
85 (0)
195 (0)
−0.04 (−1.68)
3.15 ± 0.02
3.23
2.80 ± 0.02
2.93
14
85 (0)
195 (0)
10.04 (1.68)
1.84 ± 0.09
1.11
1.48 ± 0.07
1.23
15
85 (0)
195 (0)
5 (0)
2.54 ± 0.04
2.43
1.85 ± 0.02
1.85
16
85 (0)
195 (0)
5 (0)
2.42 ± 0.05
2.43
1.92 ± 0.05
1.85
17
85 (0)
195 (0)
5 (0)
2.51 ± 0.15
2.43
1.84 ± 0.02
1.85
18
85 (0)
195 (0)
5 (0)
2.30 ± 0.05
2.43
1.84 ± 0.02
1.85
19
85 (0)
195 (0)
5 (0)
2.33 ± 0.06
2.43
1.82 ± 0.05
1.85
20
85 (0)
195 (0)
5 (0)
2.39 ± 0.06
2.43
1.84 ± 0.02
1.85
Bold values are replicates of the center points. Pre means predicted value, while Exp means experimental value.
