“…The concentration of vitamin C in beverages can be an index of quality during the storage and production process, because ascorbic acid is labile, being sensitive to the light, temperature and heat [4,5]. Many methods with different detection techniques have been reported: amperometry [3], voltammetry [5][6][7][8], spectrometry [9,10], chromatography [11], chemiluminescence [12], capillary zone electrophoresis ultraviolet detection [13]. Electrochemical techniques are the most used because of their sensitivity, selectivity, accuracy, simplicity, miniaturization and low cost.…”