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| Optimization of different extraction technologies of Osmanthus fragrans fruit oils and its fatty acid composition |
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| DOI： |
| KeyWord:Osmanthus fragrans fruit oil fatty acid extraction technology |
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| Abstract: |
| The different extraction technologies of Osmanthus fragrans (OF) fruit oils were optimized. With OF var. Semperflorens as raw material, the effects of process conditions of three extraction methods (accelerated solvent extraction, ultrasound-assisted extraction and reflux extraction) on the yield of OF fruit oil were studied by single factor experiment, and the process conditions were optimized by orthogonal experiment to determine the optimal extraction technology for OF fruit oil. Moreover, four varieties of OF fruit oils were extracted by the optimal extraction technology,and the oil yields were compared to optimize the suitable variety for OF fruit oil. And the fatty acid composition of suitable variety of OF fruit oil was further analyzed by GC-MS. The results showed that the highest oil yield was obtained by accelerated solvent extraction, and the optimal extraction conditions were obtained as follows: extraction time 8 min, extraction pressure 7 MPa and extraction temperature 96?℃. Under these conditions,the oil yield of OF var. Semperflorens fruit was the highest,reaching 29.8%. GC-MS analysis showed that the main fatty acids in OF var. Semperflorens fruit were oleic acid (43.16%), linoleic acid (38.02%), cis-10-pentadecenoic acid (12.34%) and stearic acid (3.32%). |
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