Table 3: Fe3+ and Cu2+ reducing activities of reference antioxidants and selected phenolic and flavonoid compounds at 30 µg/mL concentration.

AntioxidantFRAP assay (593 nm)CUPRAC assay (450 nm)

BHA2.3440.489
BHT2.4300.476
α-Tocopherol2.2590.403
Trolox2.0860.330
Malvin2.1890.431
ID-80.6150.145
Pelargonin2.0640.385
Silychristin1.1810.259
Callistephin2.3280.456
Oenin2.3510.464
Arachidonoyl Dopamine1.3920.308
3,4-Dihydroxy-5-methoxybenzoic acid2.4580.474
2,4,6-Trihydroxybenzaldehyde1.8390.466