Optimization and evaluation of the ultrasound-enhanced subcritical water extraction of cinnamon bark oil

Ultrasound-enhanced subcritical water extraction (USWE) of cinnamon oil was studied by self-made apparatus. Response surface methodology was applied to optimize the USWE conditions of cinnamon oil. USWE was compared with three other methods in terms of extraction conditions, cinnamon oil yield, quality and composition of cinnamon oil. Antioxidant activities of cinnamon oil from USWE were assessed. Finally, scanning electron microscopy was...