Treatment 1 g meal:30 ml solvent three times, each time ultrasound for 1 h then soaking 24 h. | Phenolic extract mg/g ± SD | Flavonoid extract μ/g ± SD | Saponin extract μ/g ± SD |
---|---|---|---|
Ethanol:1 N HCl 70:30 | 13.4 ± 0.01 | 11.7 ± 0.02 | 253.94 ± 0.01 |
Ethanol:0.5 N HCl 70:30 | 12.9 ± 0.03 | 12.6 ± 0.01 | 204.95 ± 0.02 |
Ethanol: 1 N NaOH 70:30 | 12.7 ± 0.02 | 8.1 ± 0.04 | 180.72 ± 0.10 |
Ethanol:0.5 N NaOH 70:30 | 11.1 ± 0.20 | 6.3 ± 0.03 | 135.45 ± 0.01 |
1 N NaOH | 47.6 ± 0.05 | 27.9 ± 0.10 | 431.81 ± 0.03 |
0.5 N NaOH | 37.7 ± 0.03 | 19.8 ± 0.01 | 504.77 ± 0.02 |
1 N HCl | 1.3 ± 0.04 | 1.35 ± 0.05 | ND |
0.5 N HCl | 1.2 ± 0.10 | ND | ND |
1 N NaOH then neutralize with 1 N HCl | 62.0 ± 0.05 | 40.0 ± 0.03 | 453.6 ± 0.20 |
0.5 N NaOH then neutralize with 0.5 N HCl | 54.8 ± 0.01 | 32.8 ± 0.02 | 115.93 ± 0.10 |
1 N HCl then neutralize with 1 N NaOH | 2.9 ± 0.02 | 4.5 ± 0.01 | – |
0.5 N HCl then neutralize with 0.5 N NaOH | – | – | – |