两种提取方法对小米谷糠油中营养成分的影响.pdfVIP

※分析检测 食品科学 2011, Vol. 32, No. 14 289 赵陈勇，王常青 * ，许 洁，樊 迎，王 菲 ( 山西大学生命科学学院食品科学与工程系，山西 太原 030006) 采用 CO2 超临界萃取法(supercritical carbon dioxide extraction，SCDE)和异丙醇溶剂法(isopropanol solvent extraction ，ISE)萃取小米谷糠油，并用气相色谱仪和荧光分光光度计对其中的脂肪酸组成、VE 、总甾醇、磷脂 含量和色泽进行分析。结果表明：小米谷糠油中亚油酸的含量远远高于其他食用植物油，达到 71.82% 。SCDE 法 提取的小米谷糠油与 ISE 法相比，前者的不饱和脂肪酸含量比后者下降了 0.11% ，而C1 4 至 C 2 2 饱和脂肪酸升高 0.93% ；SCDE 法的 VE 和甾醇含量分别比 ISE 法高 20.64% 和 34.82% ；磷脂含量下降99.60% ，并且色泽较浅。 C O 2 超临界；异丙醇；脂肪酸；V E ；甾醇；磷脂；色泽 Effects of Extraction Methods on Nutritional Components in Millet Bran Oil ZHAO Chen-yong ，WANG Chang-qing* ，XU Jie ，FAN Ying ，WANG Fei (Department of Food Science and Technology, College of Life Science, Shanxi University, Taiyuan 030006, China) Abstract ：Supercritical carbon dioxide extraction (SCDE) and isopropanol solvent extraction (ISE) were employed to extract millet bran oil. The fatty acid composition and the contents of sterol, vitamin E and phospholipid as well as the color change of the obtained samples were determined by gas chromatography and fluorescence spectrometry. The results showed that the content of linoleic acid in millet bran oil was even higher than other edible oils, which was up to 71.82%. The contents of unsaturated fatty acids and phospholipid in SCDE-derived millet bran oil exhibited a decrease by 0.11% and 99.60% respec- tively when compared with ISE-derived millet bran oil, but the contents of saturated fatty acids of C14 －C22, vitamin E and sterol were higher than those of ISE, which were up to 0.93%, 20.64% and 34.82%, respectively. Moreover, SCDE-derived millet bran oil revealed a lighter color. Key words ：supercritical carbon dioxide ；isopropanol ；fatty acid ；vitamin E ；sterol content ；phospholi