Table 3.
Total polyphenols, total flavonoids and antioxidant activity of S. areira L. extracts.
| Extract | Total polyphenols (mg GAE/ g d.w. ± SD) |
Total flavonoids (mg QE/ g d.w. ± SD |
DPPH |
FRAP (mg AA/ g d.w. ± SD) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| EC50 μg/mL |
mg AA/ g d.w. ± SD |
|||||||||
| Soxhlet | Maceration | Soxhlet | Maceration | Soxhlet | Maceration | Soxhlet | Maceration | Soxhlet | Maceration | |
| EA | 88.747 ± 2.207 | 92.443 ± 6.109 | 8.937 ± 0.034 | 9.281 ± 0.182 | 848.638 | n/d | 189.384 ± 0.400 | 137.002 ± 1.736 | 193.978 ± 2.486 | 135.392 ± 10.444 |
| MET | 195.787 ± 3.292 | 197.023 ± 3.353 | 12.226 ± 0.430 | 12.032 ± 0.390 | 476.560 | 485.636 | 273.597 ± 3.158 | 283.051 ± 5.062 | 301.609 ± 3.024 | 309.048 ± 4.066 |
| AQ | 84.703 ± 6.766 | 88.535 ± 3.317 | 13.631 ± 0.111 | 13.257 ± 0.206 | n/d | n/d | 88.522 ± 1.567 | 93.968 ± 1.378 | 115.730 ± 0.536 | 101.942 ± 3.491 |
| BHA | n/d | n/d | n/d | 1824.640 ± 93.983 | 1953.305 ± 78.850 | |||||
| AA | n/d | n/d | 124.126 | n/d | n/d | |||||
EA, ethyl acetate extract; MET, methanolic extract; AQ, aqueous extract.
d.w. = extract dry weight; SD = standard deviation; n/d = not determined; GAE = gallic acid equivalents; QE = quercetin equivalents; AA = ascorbic acid; BHA = Butylated hydroxyanisole.