Central composite design was applied for the ultrasound-assisted extraction from peel and seed of Campbell Early grapes and the extraction processes were optimized for the antiradical activities of the extracts by using response surface methodology. Optimal conditions were 53.45% of ethanol concentration, 45.99oC of extraction temperature and 23.93 min of extraction time for the maximum antiradical activity of grape peel extract (54.98%) and 53.14% of ethanol 56.03oC of temperature and 29.03 min of time for maximum antiradical activity of grape seed extract (90.60%).

• Kashif Ghafoor(Department of Food Science and Technology, Kyungpook National University)
• Yong Hee Choi(Department of Food Science and Technology, Kyungpook National University) Corresponding author