Table 2 Factors and levels considered in the experimental design
Factors | Key | Low level | High level | Optimum according to factorial design | Optimum of final procedure |
|---|---|---|---|---|---|
Sample amount (g) | A | 0.1 | 0.3 | 0.3 | 0.45 |
Dispersant agent A(g) | B | 0.2 | 0.4 | 0.2 | 0.2 |
Dispersant agent B(g) | C | 0.1 | 0.3 | 0.3 | 0.3 |
Elution volume (mL) | D | 1 | 2 | 2 | 3 |