FIGURE 4.

Antioxidant evolution over storage time. (A) Total phenolic contents (TPC) over storage time in F16 (left) and Duquesa seeds (right), measured in gallic acid equivalents (GAE) through the Folin-Ciocalteu method. (B) Total flavonoid content (TFC) measured in quercetin equivalents (QE) through the AlCl₃ method. (C) Antioxidant capacity of quinoa seeds measured through the FRAP assay expressed as amount of Fe²⁺ ions reduced in seeds. NSG, seeds stored without silica gel; WSG, seeds stored with silica gel.