This work reports a new method to evaluate the antioxidant capacity of infusions and beverages, based on superoxide radicals. Radicals produced by the enzymatic reaction between acetylcholinesterase and hypoxanthine oxidized antioxidant molecules present in commercially available samples or standard solutions, which was monitored by means of cyclic voltammetry using a carbon paste electrode. The Trolox equivalent antioxidant capacity (TEAC) of red wine, coffee and green tea determined using this method were: (1.20 +/- 0.06), (0.90 +/- 0.02), and (0.65 +/- 0.02), respectively. This method suggested TEACred wine > TEACcoffee > TEACgreen tea, which is the same as DPPH, spectrophotometric method. However, the electrochemical one proposed here is rapid and simple.
        
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Juarez-Gomez J, Ramirez-Silva MT, Guzman-Hernandez DS, Romero-Romo M, Palomar-Pardave M (2020) Novel electrochemical method to evaluate the antioxidant capacity of infusions and beverages, based on in situ formation of free superoxide radicals Food Chem332: 127409
Juarez-Gomez J, Ramirez-Silva MT, Guzman-Hernandez DS, Romero-Romo M, Palomar-Pardave M (2020) Food Chem332: 127409