Optimal Extraction of Gallic Acid from Suaeda glauca Bge. Leaves and Enhanced Efficiency by Ionic Liquids
Table 2
Variance analysis of experimental results of RSM.
Source
Sum of squares
Df
Mean square
value
value
Model
2437377
9
270819.7
59.10
<0.0001
2745.035
1
2745.035
0.60
0.4643
73400.05
1
73400.05
16.02
0.0052
97271.37
1
97271.37
21.23
0.0025
93434.15
1
93434.15
20.39
0.0027
68840.64
1
68840.64
15.02
0.0061
68620.42
1
68620.42
14.97
0.0061
693906.1
1
693906.1
151.42
<0.0001
1098205
1
1098205
239.64
<0.0001
74879.82
1
74879.82
16.34
0.0049
Residual
32079.38
7
4582.769
Lack of fit
20532.69
3
6844.231
2.37
0.2115
Pure error
11546.69
4
2886.673
Cor. total
2469456
16
Std. dev.
67.70
0.9870
Pred.
0.8597
Adj.
0.9730
Note. The result in Table 2 was obtained with Design-Expert v7.1.6 software. is extraction temperature (°C), is liquid-solid ratio (mL·g−1), and is extraction time (min).
