Table 1.
Experimental design matrix
| Exp | X1 | X2 (g) | X3 (rpm) | X4 (min) | X5 (%) | X6 |
|---|---|---|---|---|---|---|
| N1 | E1 | 19 | 500 | 5 | 1.50 | Yes |
| N2 | E1 | 28.5 | 1,000 | 10 | 2 | Yes |
| N3 | E1 | 38 | 1,500 | 15 | 3 | Yes |
| N4 | E2 | 19 | 500 | 10 | 2 | Yes |
| N5 | E2 | 28.5 | 1,000 | 15 | 2.50 | Yes |
| N6 | E2 | 38 | 1,500 | 5 | 1 | Yes |
| N7 | E3 | 19 | 1,000 | 5 | 3 | Yes |
| N8 | E3 | 28.5 | 1,500 | 10 | 2 | Yes |
| N9 | E3 | 38 | 500 | 15 | 2.5 | Yes |
| N10 | E1 | 19 | 1,500 | 15 | 2 | No |
| N11 | E1 | 28.5 | 500 | 5 | 2.5 | No |
| N12 | E1 | 38 | 1,000 | 10 | 1.5 | No |
| N13 | E2 | 19 | 1,000 | 5 | 1 | No |
| N14 | E2 | 28.5 | 1,500 | 5 | 1.5 | No |
| N15 | E2 | 38 | 500 | 10 | 2.5 | No |
| N16 | E3 | 19 | 1,500 | 10 | 3 | No |
| N17 | E3 | 28.5 | 500 | 15 | 2 | No |
| N18 | E3 | 38 | 1,000 | 10 | 2.5 | No |
| N19 | E1 | 28.5 | 1,000 | 10 | 2 | Yes |
| N20 | E1 | 28.5 | 1,000 | 10 | 2 | Yes |
| N21 | E1 | 28.5 | 1,000 | 10 | 2 | Yes |
Abbreviations: Exp, experiment; E1, surfactant Abil EM 180; E2, surfactant glyceryl stearate; E3, surfactant Olliva; X1, emulsifier type; X2, amount of oily phase; X3, stirring rate; X4, time of stirring; X5, ratio of the surfactant; X6, the use of a co-surfactant (yes/no).