摘要
食用油加四甲基氢氧化铵甲醇溶液，在室温中用碘甲烷将其转变为对应的甲酯。使用 Ｓｕｐｅｒｏｘ－４（２５ ｍ × ０．２ ｍｍ ｉ． ｄ．）弹性石英毛细管柱对各种脂肪酸甲酯进行分离分析。考察了不同反应时间和不同量甲基化试剂对甲酯化完全程度的影响，并用此法测定了豆油、菜油、小麻油、色拉油和煎炒色拉油后回收油的脂肪酸成分及含量。
A modified derivatization method for fatty acids in the eatable vegetable oils was described. When tetramethyl ammonium hydroxide(TMAH) in methanol solution and idomethane (CH3I) were added to the eatable vegetable oils at room temperature, fatty acids in the oils were methylated. Seperation and analysis of various methyl esters of faty acids were performed successfully by using superox-4(25 m × 0. 2 mm i. d. ) F. Q capillary column. The effect of different reaction time and different contents of methylating agent on the degree of methylation were investigated, the optimum derivatization conditions have been established. Composition and content of fatty acids in soybean oil. rapeseed oil, sesameseed oil, salad oil and recovered oil of fried salad oil were determined by this methos.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1998年第10期1226-1229,共4页
Chinese Journal of Analytical Chemistry
关键词
气相色谱法
食用油
脂肪酸
衍生化法
分析
Gas chromatography, eatable vegetable oils, fatty acid, derivatization
