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Ultrasonic Assisted Extraction of Rosa laevigata Michx. Seed Oil and Analysis of Fatty Acid Composition

CHEN Qing;LI Xu-yang;School of Chemistry and Chemical Engineering, Guizhou University;  
The ultrasonic assisted extraction of oil from R. laevigata Michx. seeds was optimized and the fatty acid composition of the oil was analyzed with GC-MS. The results should that the optimized values of extraction parameters were ultrasonic power 120 W, ultrasonic treatment temperature 50 ℃, ultrasonic treatment time 40 min, and liquid/solid ratio 1∶9(g / mL). This optimization led to an oil yield of 5.32%. Seven fatty acids were identified in the oil of R. laevigata Michx. seeds including palmitic acid, linoleic acid, oleic acid, stearic acid,ecosenoic acid, arachidic acid and docosanoic acid. The unsaturated fatty acid in the oil accounted for 86.96% and linoleic acid accounted for 62.10%.
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