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| ZHAO Baotang, SUN Dong, LIU Dong |
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| DOI： |
| KeyWord:rainbow trout rainbow trout oil ultrasound fatty acid composition |
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| Abstract: |
| With the viscera of rainbow trout as material and extraction rate of rainbow trout oil as index, rainbow trout oil was extracted by ultrasound-assisted method. The optimal conditions were obtained through response surface methodology based on single factor experiment, and the fatty acid composition, acid value and peroxide value of the rainbow trout oil were determined. The results showed that the optimal conditions of ultrasound-assisted extraction of rainbow trout oil were obtained as follow: extraction times once, ultrasonic power 200 W, ultrasonic time 58 min, ultrasonic temperature 55?℃ and ratio of liquid to solid 12∶?1.Under these conditions, the extraction rate of rainbow trout oil was 95.10%. The acid value and peroxide value of rainbow trout oil were 3.708 mgKOH/g and 1.516 mmol/kg, which met the standard of first grade crude fish oil(SC/T 3502—2016). GC-MS analysis showed that the contents of linoleic acid, linolenic acid, EPA, DHA and oleic acid in rainbow trout oil were 26.42%, 9.24%, 1.12%, 4.45% and 20.09% respectively. |
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