Red fruits are rich sources of antioxidant compounds with recognized health benefits. Since they are perishable,
dried extracts emerge as more durable products and their quality control must include antioxidant
capacity assays. In this study, the redox behavior of commercial dried products obtained from camucamu,
açai, acerola and cranberry red fruits was evaluated by electroanalytical approaches. The antioxidant
potential was determined by 2,2-diphenyl-1-picrylhydrazyl free radical assay and the electrochemical
index concept. The total phenol content was estimated by using a laccase based biosensor. A
significant correlation was found between all methods and literature data. The voltammetric profile (cyclic,
differential and square wave) obtained for each type of dried extract showed distinguishable features
that were correlated with their main major markers, being also useful for identification purposes. The
electrochemical methods were cheaper and more practical for evaluation of antioxidant properties and
total phenol content in dried powders obtained from different red fruits
Red fruits are rich sources of antioxidant compounds with recognized health benefits. Since they are perishable,dried extracts emerge as more durable products and their quality control must include antioxidantcapacity assays. In this study, the redox behavior of commercial dried products obtained from camucamu,açai, acerola and cranberry red fruits was evaluated by electroanalytical approaches. The antioxidantpotential was determined by 2,2-diphenyl-1-picrylhydrazyl free radical assay and the electrochemicalindex concept. The total phenol content was estimated by using a laccase based biosensor. Asignificant correlation was found between all methods and literature data. The voltammetric profile (cyclic,differential and square wave) obtained for each type of dried extract showed distinguishable featuresthat were correlated with their main major markers, being also useful for identification purposes. Theelectrochemical methods were cheaper and more practical for evaluation of antioxidant properties andtotal phenol content in dried powders obtained from different red fruits
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