A similar analysis can be done for the total vitamin C degradation. As observed in Tables 4
and 6, the VTC degradation of experiments with low voltage gradients was smaller than the degradation of the experiments with conventional heating. Furthermore, high voltage gradients caused higher total vitamin C degradation. This behavior can be explained by the increase of electrochemical reactions during high voltage gradient operations which release ions into the liquid that catalyze the oxidation of ascorbic acid. Qihua et al. (1993) observed Table 4 that during ohmic heating of orange juice, bubbles were produced