Table 2.
Effect of solvent on TPC, TFC, proanthocyanidin (Pro.A) content, and antioxidant activity from lemon scented tea tree leaves using ultrasound assisted extraction.
| Solvent | TPC (mg GAE/g DW) | TFC (mg CE/g DW) | Pro. A (mg CE/g DW) | FRAP (mM TE/g DW) | DPPH (mM TE/g DW) | ABTS (mM TE/g DW) | CUPRAC (mM TE/g DW) |
|---|---|---|---|---|---|---|---|
| Water | 22.46 ± 3.68c | 13.05 ± 1.95c | 18.97 ± 2.83c | 153.75 ± 19.43b | 259.09 ± 22.36c | 432.18 ± 33.78c | 1426.21 ± 70.85c |
| Acetone | 7.99 ± 0.08d | 4.84 ± 0.09d | 23.89 ± 0.93b | 25.93 ± 0.31c | 503.69 ± 9.82ab | 215.07 ± 24.91d | 348.67 ± 13.56d |
| Ethanol | 7.35 ± 1.03d | 5.27 ± 0.57d | 3.79 ± 0.24d | 25.77 ± 7.36c | 34.88 ± 7.79d | 132.29 ± 14.36e | 397.80 ± 39.71d |
| 50% Acetone | 60.24 ± 6.21a | 33.87 ± 0.69a | 45.99 ± 0.88a | 304.77 ± 19.99a | 556.63 ± 34.72a | 1078.84 ± 16.28a | 3542.43 ± 317.95a |
| 50% Ethanol | 35.11 ± 2.84b | 19.98 ± 2.01b | 27.34 ± 2.54b | 160.34 ± 35.43b | 485.77 ± 12.80b | 859.71 ± 17.83b | 2016.48 ± 249.61b |
The values are the mean ± standard deviation for at least triplicate experiments and those in the same row not sharing the same superscript letter are significantly different from each other at p < 0.05. mg GAE/g DW = mg gallic acid equivalent per gram of sample dry weight, mg CE/g DW = milligram catechin equivalent per gram of sample dry weight, mM TE/g DW = mM trolox equivalent per gram of sample dry weight.