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

• Published in: Engineering (Beijing, China) Vol. 2; no. 2; pp. 258 - 262
• Main Authors: Guan, Mei, Chen, Hong, Xiong, Xinghua, Lu, Xin, Li, Xun, Huang, Fenghong, Guan, Chunyun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2016; Department of Agronomy, Hunan Agricultural University, Changsha 410128, China%Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; Elsevier
• Subjects: Brassica napus; Fatty acid; LC-MS/MS; Triacylglycerol; 甘油三酯; 结构; 脂肪酸组成; 菜籽油; 营养价值; 高效液相色谱-串联质谱; 高油酸; Triacylglycerol; Brassica napus; Fatty acid
• ISSN: 2095-8099
• DOI: 10.1016/J.ENG.2016.02.004

The composition of fatty acids in triacylglycerides （TAGs） and their position on the glycerol backbone de- termine 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 compo- sition and distribution of fatty acids in TAGs of different rapeseed oils. Our results show the content of oleic acid in higb-oleic-acid rapeseed oil to be about 80%. In terms of the number of acyl carbon atoms （CN）, TAGs with CN52-54 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 ？.56%, oleic-oleic-linolenic （OOLn） accounted for 4.81%, and stearic-oleic-oleic （SO0） 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.