Evaluation of Antioxidant Capacity (ABTS and CUPRAC) and Total Phenolic Content (Folin-Ciocalteu) Assays of Selected Fruit, Vegetables, and Spices

Figure 4

Calibration curves of GA standards in 40% ethanol and Milli-Q water, at 750 nm and 760 nm, after 20 min and 90 min of incubation.