Pulsed electric field energy calculation to damage red galangal (Alpinia purpurata, K. Scumm) rhizome slices and its essential oil yield and quality with hydrodistillation.

This study aimed to determine the amount of energy to damage the red galangal rhizome sliced cell tissue and the amount and quality of the essential oil obtained by steam-water distillation. This study was a randomized block design, with pulsed electric field (PEF) voltage treatment starting at 1000, 2000, 3000, 4000, and 5000 V and without PEF and repeated three times. The results showed that the voltage between 3000 and 4000 V (E = 120-160 V/cm) or equivalent to 271.