Optimisation of the Total Oxidant Scavenging Capacity Assay and Application on <i>Euterpe Oleracea</i> Mart. (Açaí) Pulps and Seeds

The antioxidant capacities of commercial and non-commercial pulps and seeds of the Euterpe oleracea Mart., Arecaceae, (açaí) palm were surveyed against peroxyl radicals, peroxynitrite and hydroxyl radicals. Analyses were carried out with the Total Oxidant Scavenging Capacity (TOSC) assay in a modified and automated version. The results were compared to several standard compounds as well as to a number of common European fruit and vegetable juices. Several antioxidants present in açaí pulps and seeds were identified, quantified and their contribution to the overall antioxidant capacities was estimated