异构化棉油甲酯中共轭亚油酸的定量分析研究

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	异构化棉油甲酯中共轭亚油酸的定量分析研究
	刘远凤; 努尔买买提; 吾满江·艾力; 刘刚; 陶敏芳
刊名	中国油脂
	2004
卷号	29 期号:6 页码:24-26
关键词	cottonseed oil isomerization cottonseed oil methyl esters conjugated linoleic acid quantitative analysis
ISSN号	1003-7969
其他题名	quantitative analysis of conjugated linoleic acid in isomerized methyl ester of cottonseed oil
中文摘要	研究了棉油甲酯在碘的催化下发生异构化反应的规律 ,运用气质联用仪和紫外光谱对异构化产物的成分进行了分析。在最佳的异构化条件下 ,异构化棉油甲酯中共轭亚油酸质量分数可达 31.2 % ,共轭转化率 5 6 % ;根据不同质量浓度样品的紫外吸收曲线找出样品质量浓度与吸光度之间的线性关系 ,并参照气质联用分析的共轭亚油酸质量分数结果 ,得出紫外光谱法分析计算异构化产物中共轭亚油酸质量分数的经验公式为 :ω(CLA) =0 .0 0 80 1A/C ,吸光系数为 0 .0 0 80 1,适宜的质量浓度为 0 .0 2～ 0 .0 4g/L ,误差小于 5 %。实验证实紫外光谱法是分析测定棉油甲酯异构化产物中共轭亚油酸的一种简便、快捷的方法
英文摘要	The isomerization of methyl ester of cottonseed oil under the catalyst iodine was investigated. By the methods of GC-MS and UV, the constituents of isomerized products were analyzed. Under the optimum isomerization conditions, mass fraction of conjugated linoleic acid in isomerized cottonseed oil methyl esters was 31.2%, and conversion of conjugation was 56%. UV absorbancy curve of measured samples at different concentration was plotted, and lineal' relationship of absorbancy and samples' concentration was determined. Combined the accurate concentration of conjugated linoleic acid by GC-MS, the empirical formula for the quantilation of conjugated linoleic acid in isomerized products was obtained, omega_(conjugated linoleic acid)=0.0080l'A/C. The absorbance constant was 0.00801, optimum mass concentration was 0.02～0.04g/L, and error was less than 5%. The results show that UV is a simple and quick metliod for determination of conjugated linolleic acid in isomerized cottonseed oil methyl esters.
学科主题	Engineering (provided by Thomson Reuters)
公开日期	2012-11-29
内容类型	期刊论文
源URL	[http://ir.xjipc.cas.cn/handle/365002/2199]
专题	新疆理化技术研究所_新疆维吾尔自治区精细化工工程技术研究中心
作者单位	中国科学院新疆理化技术研究所
推荐引用方式 GB/T 7714	刘远凤,努尔买买提,吾满江·艾力,等. 异构化棉油甲酯中共轭亚油酸的定量分析研究[J]. 中国油脂,2004,29(6):24-26.
APA	刘远凤,努尔买买提,吾满江·艾力,刘刚,&陶敏芳.(2004).异构化棉油甲酯中共轭亚油酸的定量分析研究.中国油脂,29(6),24-26.
MLA	刘远凤,et al."异构化棉油甲酯中共轭亚油酸的定量分析研究".中国油脂 29.6(2004):24-26.