Abstract:

The present work was undertaken to investigate optimal conditions for ultrasonic-assisted extraction azocyclotin
from dried jujube. The effects of five factors including ultrasonic power, extraction temperature, extraction time, solid-toliquid
ratio and extraction number on extraction efficiency were explored using a combination of single factor method and
response surface methodology. An extraction temperature of 45 ℃, an ultrasonic frequency of 45 kHz, an ultrasonic power
of 70 W and 50 min extractions performed six times with a solid-to-liquid ratio of 1:12 (g/mL) were selected as the optimal
extraction conditions. Experiments conducted under these conditions resulted in an extraction rate of 0.15 mg/kg.

Key words: ultrasonic-assisted extraction, jujube, azocyclotin