Abstract:  In this paper,the technological condition of extracting lecithin from quails’ egg yolk aided with ultrasonic was researched. The effect of such factors as solvent component and amount,time and degree on extraction efficiency was studied,and orthogonal test was made to research reciprocity among primary factors and to optimize technological condition. The results showed that the optimum conditions were: the ratio of ethanol to aether 2:1,using 4 times solvent as much as egg yolk volume,extracting 30min,and repeating once above-mentioned operation,on this conditions the yield reached 87.5% and the purity of product was 70.3%. This method was charactered with convenient,great efficiency and little solvent leavings. So it is feasible to extract lecithin from quails’ egg yolk.

Key words:  quails&rsquo, egg yolk； lecithin； ultrasonic； extraction； technological condition；