Table 3.
Total phenolic contents (UPLC-DAD-ESI-TQ-MS analysis) and antioxidant activity.
| Sample | Total Phenolics UPLC 1 (µg/g Extract) | DPPH 2 IC50 (μg/mL) | ORAC 2 (mmol TE/mg Extract) |
|---|---|---|---|
| P. alliacea | 473.0 | >1000 a | 1.32 a ± 0.11 |
| P. niruri | 1909.6 | 6.40 b ± 0.10 | 6.50 b ± 0.15 |
| S. reticulata | 708.8 | 72.90 c ± 1.10 | 2.68 c ± 0.28 |
1 Σ = [hydroxybenzoic acids + hydroxycinnamic acids + flavan-3-ols monomers + procyanidin dimers + propelargonidin dimers + procyanidin trimers] contents (µg/g extract) (Table 2). 2 Different superscript letters in the same column indicate differences are significant at p < 0.05.