Table 6.
Antioxidant activity characterisation in EAQ and EA70 grape pomace skin extracts.
| Skins-EAQ | ||||||
|---|---|---|---|---|---|---|
| GRE2 a | SYR1 a | SYR2 a | CAR a | MOU a | ALI a | |
| ORAC b | 1190.70 ± 183.58ab | 1345.94 ± 19.15ab | 1065.98 ± 84.21a | 1077.76 ± 60.16a | 1033.76 ± 77.61a | 1714.62 ± 14.77b |
| FRAP b | 0.56 ± 0.01c | 0.88 ± 0.01e | 0.14 ± 0.02a | 0.67 ± 0.02d | 0.32 ± 0.01b | 1.13 ± 0.00f |
| ABTS b | 934.12 ± 11.9b | 1427.98 ± 54.80c | 668.30 ± 29.99a | 1048.83 ± 101.57b | 965.59 ± 16.63b | 1760.08 ± 91.03d |
| DPPH b | 99.45 ± 10.82a | 690.29 ± 147.01bc | 263.85 ± 71.54ab | 591.01 ± 85.59abc | 279.43 ± 61.65ab | 1057.12 ± 45.22c |
| Skins-EA70 | ||||||
| GRE2 a | SYR1 a | SYR2 a | CAR a | MOU a | ALI a | |
| ORAC b | 1828.26 ± 40.37bc | 1912.56 ± 6.09bc | 1701.83 ± 88.34bc | 1238.38 ± 11.09a | 2070.03 ± 60.64c | 1628.45 ± 82.58b |
| FRAP b | 1.32 ± 0.03c | 1.52 ± 0.05d | 0.94 ± 0.03a | 1.34 ± 0.03c | 1.03 ± 0.02ab | 1.13 ± 0.01b |
| ABTS b | 2612.08 ± 130.93a | 2614.5 ± 10.42a | 2010.64 ± 146.96a | 2555.92 ± 146.04a | 2674.84 ± 187.30a | 1923.37 ± 87.01a |
| DPPH b | 876.96 ± 74.32a | 1391.69 ± 37.24bc | 1164.91 ± 55.55ab | 1075.39 ± 46.16ab | 833.28 ± 26.37a | 1749.31 ± 112.65c |
a GRE2, Grenache; SYR1 and SYR2, Syrah; CAR, Carignan; MOU, Mourvèdre; ALI, Alicante. Data are expressed as the mean of triplicate ± SD. b ORAC, ABTS and DPPH are expressed as µmol Trolox/g DW and FRAP as mmol Fe2+/g DW. a, b, c, d, e, f; ANOVA was made to compare values obtain between varieties for the same test. Same letters indicate no significant differences between the value (Tukey’s test, p < 0.05).