Table 2 Box-Behnken design matrix and corresponding experimental responses (n = 3).
NO. | SA (m/V) | CaCl2 (m/V) | CS (m/V) | Stirring time (minutes) | Speed (rpm) | EE (%) |
|---|---|---|---|---|---|---|
1 | 0 | 0 | 0 | 0 | 220 | 98.18 |
2 | 0 | + 1 | −1 | 0 | 220 | 98.33 |
3 | + 1 | 0 | + 1 | 0 | 220 | 93.04 |
4 | 0 | 0 | 0 | 0 | 220 | 94.36 |
5 | 0 | 0 | −1 | + 1 | 220 | 95.63 |
6 | 0 | −1 | + 1 | 0 | 220 | 98.64 |
7 | 0 | 0 | + 1 | −1 | 220 | 96.24 |
8 | 0 | −1 | −1 | 0 | 220 | 94.15 |
9 | 0 | 0 | 0 | 0 | 220 | 96.29 |
10 | −1 | + 1 | 0 | 0 | 220 | 97.88 |
11 | −1 | 0 | 0 | −1 | 220 | 92.04 |
12 | 0 | 0 | 0 | 0 | 220 | 92.60 |
13 | + 1 | 0 | 0 | −1 | 220 | 96.61 |
14 | 0 | + 1 | + 1 | 0 | 220 | 92.82 |
15 | −1 | −1 | 0 | 0 | 220 | 97.19 |
16 | 0 | + 1 | 0 | + 1 | 220 | 95.93 |
17 | −1 | 0 | + 1 | 0 | 220 | 90.07 |
18 | 0 | −1 | 0 | + 1 | 220 | 96.35 |
19 | −1 | 0 | 0 | + 1 | 220 | 95.60 |
20 | + 1 | −1 | 0 | 0 | 220 | 91.40 |
21 | 0 | −1 | 0 | −1 | 220 | 92.64 |
22 | + 1 | 0 | 0 | + 1 | 220 | 94.62 |
23 | 0 | + 1 | 0 | −1 | 220 | 91.96 |
24 | + 1 | 0 | −1 | 0 | 220 | 91.76 |
25 | 0 | 0 | −1 | −1 | 220 | 92.81 |
26 | 0 | 0 | + 1 | + 1 | 220 | 94.49 |
27 | + 1 | + 1 | 0 | 0 | 220 | 95.59 |
28 | 0 | 0 | 0 | 0 | 220 | 99.28 |
29 | −1 | 0 | −1 | 0 | 220 | 94.74 |
