Table 2 L9 (3^4) experimental matrix, response and SN-ratio
Exp. no. | Control factors | Response | Estimated SN-ratio | |||
|---|---|---|---|---|---|---|
Irradiation time (min) | Microwave power(W) | Particle size(mm) | Molar ratio(ml/g) | Extraction yield (v/w)% | ||
A:A | B:B | C:C | D:D | |||
1 | −1 | −1 | −1 | −1 | 0.49 ± 0.02 | −6.13 |
2 | −1 | 0 | 0 | 0 | 0.62 ± 0.01 | −4.21 |
3 | −1 | +1 | +1 | +1 | 1.83 ± 0.04 | 5.23 |
4 | 0 | −1 | 0 | +1 | 0.17 ± 0.07 | −15.60 |
5 | 0 | 0 | +1 | −1 | 0.21 ± 0.08 | −13.39 |
6 | 0 | +1 | −1 | 0 | 0.92 ± 0.01 | −0.69 |
7 | +1 | −1 | +1 | 0 | 0.26 ± 0.05 | −11.77 |
8 | +1 | 0 | −1 | +1 | 4.28 ± 0.04 | 12.62 |
9 | +1 | +1 | 0 | −1 | 1.87 ± 0.32 | 5.44 |