Table 4.
Antioxidant properties of the chlorogenic acid, chlorogenates, trolox, l-ascorbic acid and BHT expressed as the ability to scavenge 50% of the free radical DPPH· (α, α-diphenyl-β-picrylhydrazyl) (EC50) and FRAP (ferric reducing antioxidant power) values (at concentrations 5 and 2.5 μM).
| Compound | DPPH | FRAP Values | |
|---|---|---|---|
| EC50 [µM] | Ccompound [µM] | C Fe2+ [µM] | |
| 5-CQA | 7.39 ± 0.71 | 5 2.5 |
114.22 ± 8.09 72.53 ± 2.42 |
| Li 5-CQA | 5.28 ± 0.375 | 5 2.5 |
106.92 ± 1.28 78.93 ± 4.23 |
| Na 5-CQA | 4.50 ± 0.36 | 5 2.5 |
141.13 ± 5.78 103.08 ± 2.79 |
| K 5-CQA | 5.32 ± 0.49 | 5 2.5 |
132.00 ± 6.07 99.89 ± 7.05 |
| Rb 5-CQA | 5.40 ± 0.68 | 5 2.5 |
123.16 ± 9.56 86.70 ± 2.86 |
| Cs 5-CQA | 5.89 ± 1.57 | 5 2.5 |
117. 00 ± 6.22 80.47 ± 5.68 |
| Trolox | 8.25 ± 0.75 | 5 | 70.85 ± 3.57 |
| l-ascorbic acid | 10.87 ± 0.53 | 5 | 81.70 ± 4.23 |
| BHT | 52.80 ± 2.83 | 5 | 69.66 ± 5.54 |