Extraction efficacy of newly designed electric fields on red beetroot samples

A newly designed voltage treatment chamber for AC electric field application with high voltage transformer, voltage divider, over current limiter, and vacuum treatment chamber was utilized to treat red beetroot samples by 0.00–11.5 kV, 400–1013 mbar, and 18.15–20.00min. Applied processing parameters caused a significant increase in the total antioxidant capacity. The best-fit multiple (non-) linear regression models with response optimization revealed 4.6 kV, 400 mbar, and 30.90% moisture as the most optimal processing parameters with 0.8313 composite desirability. Application of electric fields may be utilized for the electroporation of the plant tissue without adverse effect on important properties.