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学科主题: Engineering (provided by Thomson Reuters)
题名: 异构化棉油甲酯中共轭亚油酸的定量分析研究
其他题名: quantitative analysis of conjugated linoleic acid in isomerized methyl ester of cottonseed oil
作者: 刘远凤; 努尔买买提; 吾满江·艾力; 刘刚; 陶敏芳
关键词: cottonseed oil ; isomerization ; cottonseed oil methyl esters ; conjugated linoleic acid ; quantitative analysis
刊名: 中国油脂
发表日期: 2004
卷: 29, 期:6, 页:24-26
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.
内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/2199
Appears in Collections:新疆维吾尔自治区精细化工工程技术研究中心_期刊论文

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作者单位: 中国科学院新疆理化技术研究所

Recommended Citation:
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.
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文件名: 棉油甲酯异构化反应规律的研究_共轭亚油酸含量的测定.pdf
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