Table 2 Selenization schemes by Box-Behnken design and the responsive results
No. | Factors and levels | Se Content of Se-ESPS (mg/g) | ||
|---|---|---|---|---|
X1 (h) | X2 (℃) | X3 (g/g) | ||
1 | 4 | 70 | 0.8 | 0.793 |
2 | 6 | 70 | 0.8 | 1.205 |
3 | 4 | 90 | 0.8 | 0.959 |
4 | 6 | 90 | 0.8 | 1.592 |
5 | 4 | 80 | 0.6 | 0.611 |
6 | 6 | 80 | 0.6 | 1.418 |
7 | 4 | 80 | 1.0 | 1.755 |
8 | 6 | 80 | 1.0 | 1.693 |
9 | 5 | 70 | 0.6 | 0.759 |
10 | 5 | 90 | 0.6 | 1.286 |
11 | 5 | 70 | 1.0 | 1.907 |
12 | 5 | 90 | 1.0 | 2.301 |
13 | 5 | 80 | 0.8 | 2.974 |
14 | 5 | 80 | 0.8 | 2.797 |
15 | 5 | 80 | 0.8 | 2.916 |
16 | 5 | 80 | 0.8 | 2.865 |
17 | 5 | 80 | 0.8 | 2.951 |