| The ultrasound-assisted extraction of oil from Andrias davidianus liver was studied and the fatty acid composition of the oil was analyzed by gas chromatography. The optimal conditions of ultrasound-assisted extraction of oil from Andrias davidianus liver were obtained as follows: with hexane-isopropanol (volume ratio 1∶?1) as extraction solvent, ultrasonic power 500 W, ratio of liquid to material 10∶?1, extraction time 30 min and extraction temperature 50?℃. Under these conditions, the extraction rate was 90.86%. There were 12 kinds of fatty acids in Andrias davidianus liver oil. The contents of saturated fatty acids (SFA), unsaturated fatty acids(UFA), monounsaturated fatty acids(MUFA), polyunsaturated fatty acids(PUFA), ω-6 PUFA and ω-3 PUFA were 33.95%, 66.05%, 31.37%, 34.68%, 27.29% and 7.39% respectively. The ratios of UFA to SFA and ω-6 PUFA to ω-3 PUFA were 1.95 and 3.69 respectively. The results indicated that Andrias davidianus liver had a high nutritional value and considerable potential for oil exploitation. |
