Online literature is provided as Adobe Acrobat Portable Document Format (PDF) files. Obtain your free copy of the current Acrobat Reader from Adobe Systems.

二维中心切割气相色谱分析混有生物柴油的柴油中脂肪酸甲酯的含量和分布

Abstract: 二维中心切割气相色谱分析混有生物柴油的柴油中脂肪酸甲酯的含量。采用微板流路控制技术Deans Switch 将第一根非极性毛细管柱的样品导入第二根极性毛细管柱中。第一根柱将脂肪酸甲酯与多数石油烃类化合物分离。脂肪酸甲酯被选择性转移到第二根柱中，与余下的烃类基质完全分离。仪器用所有分离的脂肪酸甲酯（1 到25%，v/v）的总的响应因子校正。校正后，分离了商用的含20% 生物柴油的柴油样品，结果显示了良好的定量精密度。同时测定了各种脂肪酸甲酯的分布，结果表明商用样品中含有由大豆油制得的生物柴油。混有由棕榈和椰子制得的生物柴油的柴油样品中的脂肪酸甲酯的分离也可采用二维中心切割气相色谱方法。 The analysis of the fatty acid methyl ester (FAME) content in blended biodiesel samples is described using a heartcutting two-dimensional (2D) gas chromatographic (GC) system. A Capillary Flow Technology Deans switch is used to interface a primary nonpolar capillary column to a secondary polar capillary column. The primary column separates most of the petroleum hydrocarbons from the FAMEs. The FAMEs are selectively transferred to the secondary column, where they are completely resolved from the remaining hydrocarbon matrix. The instrument is calibrated using the total response of all separated FAME peaks over a range of 1 to 25 volume percent. After calibration, a sample of commercially blended B20 biodiesel is analyzed; the results show excellent quantitative precision. The distribution of individual FAMEs is also determined and the results show that the commercial sample contains biodiesel made from soybean oil. The separation of palm oil and coconut oil FAMEs in biodiesel blends is also demonstrated using the heart-cutting 2D GC approach.

View Article (0.58 MB)

For your convenience this PDF file will open in a separate window, and you may need to adjust your pop up blocker setting.