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| Effects of different oil producing processes on characteristics and quality of Xanthoceras sorbifolia Bunge. oil |
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| KeyWord:Xanthoceras sorbifolia Bunge. oil oil producing process acid value peroxide value unsaturated fatty acid DPPH free radical scavenging rate |
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| Abstract: |
| Effects of different oil producing processes (leaching method, ordinary screw press method, aqueous enzymatic extraction method and supercritical CO2 extraction method) on the characteristics and quality of Xanthoceras sorbifolia Bunge. oil were studied.The results showed that leaching method had the highest oil yield and the lightest oil color, aqueous enzymatic extraction method had the highest moisture and volatile matter content, ordinary screw press method had the lowest acid value, aqueous enzymatic extraction method had the lowest peroxide value. The unsaturated fatty acids in Xanthoceras sorbifolia Bunge. oil were mainly composed of oleic acid and linoleic acid, the content of unsaturated fatty acids was the highest in aqueous enzymatic extraction oil, tocopherol and sterol contents were the highest in leaching oil. In 62℃ oven experiment, the four Xanthoceras sorbifolia Bunge. oils all had little change of acid value, while peroxide values decreased exponentially, also the contents of tocopherols decreased. The DPPH free radical scavenging rates of Xanthoceras sorbifolia Bunge. oil produced by supercritical CO2 were the highest before and after 62℃ oven experiment, and the DPPH free radical scavenging rates of the four Xanthoceras sorbifolia Bunge. oils were all very low after oven experiment. |
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