Table 2 Effect of single-factors on extraction of zerumbone from Z. zerumbet rhizome using microwave extraction method
Single-factor experiments | |||||||
|---|---|---|---|---|---|---|---|
Ethanol/water (% v/v) | Irradiation time (s) | MW Power (W) | Liquid-to-solid ratio (mL/g) | ||||
(% v/v) | Zerumbone (mg/g DM) | (s) | Zerumbone (mg/g DM) | (W) | Zerumbone (mg/g DM) | Ratio (mL/g) | Zerumbone (mg/g DM) |
20 | 4.11 ± 0.17b | 30 | 4.15 ± 0.10d | 300 | 3.78 ± 0.09c | 10 | 3.26 ± 0.08e |
40 | 4.87 ± 0.13a | 60 | 5.1 ± 0.18a | 400 | 4.32 ± 0.12b | 20 | 3.88 ± 0.09d |
60 | 3.66 ± 0.08c | 90 | 4.86 ± 0.15b | 500 | 4.65 ± 0.10a | 25 | 4.21 ± 0.16c |
80 | 3.43 ± 0.14d | 120 | 4.45 ± 0.16c | 600 | 3.55 ± 0.08d | 30 | 5.08 ± 0.18a |
100 | 3.25 ± 0.09e | 180 | 4.30 ± 0.17c | 700 | 3.21 ± 0.08e | 40 | 4.76 ± 0.15b |
210 | 3.52 ± 0.11e | 800 | 2.91 ± 0.06f | ||||