Abstract: The ultrasound-assisted extraction process of apple seed oil was studied with orthogonally rotational combination design method. The mathematic model was found with ultrasound-assistedd extraction process of apple seed oil. The optimum factors are: the ratio of liquid to material 8, extracting time 35 min, extracting temperature 35 ℃ and ultrasonic frequency 60 kHz. The results of GC-MS analysis showed that eight fatty acids are found in apple seed oil, and the content of unsaturated fatty acids is 89.39%. By comparing with Soxhlet extraction, the study demonstrate that ultrasound is a reliable and highly efficient tool for the fast extraction of apple seed oil.

Key words: apple seed oil, ultrasound, GC-MS analysis, physical-chemical properties