高油酸油菜中甘油三酯的组成及结构研究

doi:10.1016/J.ENG.2016.02.004

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工程（英文） ›› 2016, Vol. 2 ›› Issue (2) : 258-262. DOI: 10.1016/J.ENG.2016.02.004

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高油酸油菜中甘油三酯的组成及结构研究

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A Study on Triacylglycerol Composition and the Structure of High-Oleic Rapeseed Oil

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Abstract

The composition of fatty acids in triacylglycerides (TAGs) and their position on the glycerol backbone determine the nutritional value of vegetable oil. In this study, gas chromatography and high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) were used to analyze the composition and distribution of fatty acids in TAGs of different rapeseed oils. Our results show the content of oleic acid in high-oleic-acid rapeseed oil to be about 80%. In terms of the number of acyl carbon atoms (CN), TAGs with CN52–C54 were most abundant, with a maximum concentration at CN54 (80%). The main type of TAG was oleic-oleic-oleic (OOO), accounting for 71.75%, while oleic-oleic-linoleic (OOL) accounted for 7.56%, oleic-oleic-linolenic (OOLn) accounted for 4.81%, and stearic-oleic-oleic (SOO) accounted for 4.74%. Oleic acid in high-oleic-acid rapeseed oil was distributed in the following order of preference: sn-2 > sn-1/3. In high-erucic-acid rapeseed oil, however, oleic acid was enriched at the sn-1/3. These data show that the content of oleic acid can be as high as about 80% in high-oleic-acid material. This finding suggests that high-oleic-acid rapeseed oil has high nutritional value.

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Brassica napus / Fatty acid / Triacylglycerol

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. . Engineering. 2016, 2(2): 258-262 https://doi.org/10.1016/J.ENG.2016.02.004

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Acknowledgements

This study was supported by the Introduction of International Advanced Agricultural Science and Technology program (948 Project) (2006-G04) and the Open Fund of Hubei Key Laboratory of Oil Chemistry and Nutrition.

Mei Guan, Hong Chen, Xinghua Xiong, Xin Lu, Xun Li, Fenghong Huang, and Chunyun Guan declare that they have no conflict of interest or financial conflicts to disclose.