Table 2.
Experiment conditions and the extraction yields of the alkaloids for the Box–Behnken design.
| Run | Factors | Extraction Yield (μg/g) | ||||||
|---|---|---|---|---|---|---|---|---|
| X1 (min) | X2 (W) | X3 (°C) | Higenamine | Liensinine | Dauricine | Isoliensinine | Neferine | |
| 1 | 5 | 500 | 90 | 405.1 | 255.2 | 1372.8 | 15.9 | 1008.9 |
| 2 | 17.5 | 1500 | 120 | 874.7 | 856.5 | 3015.7 | 131.3 | 2424.6 |
| 3 | 17.5 | 1000 | 90 | 750.5 | 744.6 | 2450.6 | 56.7 | 2202.1 |
| 4 | 17.5 | 1000 | 90 | 762.3 | 554.9 | 2372.6 | 92.5 | 1991.5 |
| 5 | 30 | 1000 | 120 | 912.6 | 835.4 | 2413.5 | 106.7 | 2315.6 |
| 6 | 17.5 | 1000 | 90 | 935.4 | 761.9 | 3050.6 | 42.5 | 2776.5 |
| 7 | 17.5 | 500 | 120 | 677.9 | 667.0 | 2285.3 | 88.4 | 1808.9 |
| 8 | 5 | 1000 | 60 | 228.3 | 139.2 | 767.6 | 21.5 | 644.5 |
| 9 | 17.5 | 1500 | 60 | 205.4 | 136.7 | 771.3 | 20.3 | 632.4 |
| 10 | 30 | 500 | 90 | 582.3 | 536.6 | 2170.5 | 71.6 | 1611.1 |
| 11 | 5 | 1000 | 120 | 717.4 | 630.2 | 2395.1 | 88.7 | 1895.8 |
| 12 | 30 | 1000 | 60 | 122.0 | 50.8 | 529.0 | 33.6 | 458.4 |
| 13 | 30 | 1500 | 90 | 715.3 | 673.6 | 2549.0 | 84.7 | 2030.7 |
| 14 | 17.5 | 1000 | 90 | 707.8 | 684.9 | 2185.5 | 59.6 | 2169.2 |
| 15 | 5 | 1500 | 90 | 250.5 | 130.8 | 836.9 | 19.4 | 675.8 |
| 16 | 17.5 | 500 | 60 | 261.8 | 136.1 | 858.0 | 21.9 | 734.1 |
| 17 | 17.5 | 1000 | 90 | 756.5 | 757.7 | 2171.8 | 71.4 | 1933.0 |
X1: Extraction time; X2: Microwave power; X3: Temperature.