A Study on Triacylglycerol Composition and the Structure of High-Oleic Rapeseed Oil. (June 2016)

• Record Type: Journal Article
• Authors: Guan, Mei; Chen, Hong; Xiong, Xinghua; Lu, Xin; Li, Xun; Huang, Fenghong; Guan, Chunyun
• Is Part Of: Engineering. Volume 2:Number 2(2016)
• Page Start: 258
• Page End: 262
• Publication Date: 2016-06
• Subjects: Brassica napus -- Fatty acid -- Triacylglycerol; Engineering -- Periodicals; Engineering -- China -- Periodicals; 620.005
• DOI: 10.1016/J.ENG.2016.02.004
• Languages: English
• ISSNs: 2095-8099

Abstract

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.