Table 3.
Comparison of total phenolic content, α-mangostin content and antioxidant properties from dried mangosteen pericarp extract by microwave-assisted extraction (MAE) and water bath extraction (WBE) techniques.
| Sample | TPC | FRAP | Antioxidant properties |
α-M content (HPLC) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| DPPH |
ABTS |
|||||||||
| % | IC50 | TE | % | IC50 | TE | α-M | ||||
| ODMPE (Predicted) | 320.31 | 144.56 | 83.63 | - | - | 93.77 | - | - | - | - |
| ODMPE (Actual) | 316.92 ± 3.72a | 143.70 ± 1.84a | 70.33 ± 5.40a | 176.90 ± 6.36b | 245.22 ± 8.77a | 88.26 ± 4.97a | 94.21 ± 8.57b | 288.07 ± 29.15a | 1921.34 ± 267.41a | 100.48 ± 2.12a |
| WDMPE | 192.29 ± 11.51b | 125.36 ± 7.41b | 63.22 ± 2.28a | 186.17 ± 4.43c | 234.75 ± 9.00a | 99.85 ± 0.07a | 78.90 ± 2.66b | 327.77 ± 12.52a | 2285.49 ± 114.84a | 93.56 ± 1.63b |
| Trolox | - | - | - | 31.68 ± 0.03a | - | - | 23.59 ± 0.00a | - | - | - |
| α-M | - | - | - | - | - | - | 144.25 ± 0.03c | - | - | - |
Results are expressed as means ± standard deviation. Different letters within the same column denote significant differences among extraction methods (p < 0.05). Expression of units are as follows: TPC: mg GAE/g extract; FRAP: mg TE/g extract; IC50: μg/mL; TE (Trolox equivalent): mg TE/g extract; α-M (α-mangostin): mg α-M/g extract. ODMPE is optimized dried mangosteen pericarp extract from MAE; WDMPE is dried mangosteen pericarp extract from WBE.