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| Effect of refining process on quality of Cyperus esculentus L.oil |
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| DOI： |
| KeyWord:Cyperus esculentus L.oil refining physicochemical property nutritional composition antioxidant capacity |
| FundProject:国家自然科学基金项目（32272323） |
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| Abstract: |
| In order to provide reference for the deep processing of Cyperus esculentus L. oil, low-temperature pressed Cyperus esculentus L. crude oil was refined, and the physicochemical properties, nutritional components, and antioxidant capacity of Cyperus esculentus L. oil in different refining processes (degumming, deacidification, decolorization, deodorization) were determined, and the correlation of various indicators was analyzed to clarify the effect of refining process on the quality of Cyperus esculentus L. oil. The results showed that compared with crude oil, degumming significantly reduced the peroxide value, phospholipid content and contents of (γ+β)-,δ- tocopherol of Cyperus esculentus L. oil. Deacidification significantly reduced the acid value, total phenols content, and α- tocopherol content of Cyperus esculentus L. oil. Decolorization significantly increased the a* absolute value and L* value of Cyperus esculentus L. oil, changed the composition of its volatile components, reduced b* value, total phenols content and antioxidant capacity, while losing a large amount of tocopherol. Deodorization significantly reduced the a* absolute value, b* value, iodine value, phospholipid content and contents of (γ+β)-,δ- tocopherol of Cyperus esculentus L. oil, increased the peroxide value, L* value, and UV extinction coefficient (K232, K270), and further reduced its antioxidant capacity on the basis of decolorization. Correlation analysis showed that the antioxidant capacity of Cyperus esculentus L. oil was significantly positively correlated with the tocopherol (α-, (γ+β-), δ- tocopherol) content and total phenols content (p<0.05). In summary, each refining process has a significant impact on the basic physicochemical properties, nutritional components, and antioxidant capacity of Cyperus esculentus L. oil, in which deodorization has the greatest impact on the quality of Cyperus esculentus L. oil. |
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