全二维气相色谱/飞行时间质谱用于柴油组成的研究

 将全二维气相色谱法(GC×GC)用于柴油馏分的组成分布研究，建立了两种GC×GC方法,一种用于柴油组成的详细表征,另一种用于柴油族组成的快速分离和定量，两种方法均不需要样品预处理。用前一种方法对柴油馏分中的烃类化合物、主要的含硫化合物与含氮化合物组成进行了研究；对催化裂解柴油中的27种含氮化合物和42种含硫化合物进行了定性；用后一种方法在70 min内即可完成柴油馏分族组成的定量分析，应用所建立的方法测定了4个不同来源的柴油馏分中非芳烃、一环芳烃、二环芳烃、三环芳烃的含量，定量结果与ASTM D2425法

Characterization and Quantitative Determination of Diesel Fractions by Comprehensive Two-Dimensional Gas Chromatography/Time of Flight Mass Spectrometry

Comprehensive two-dimensional gas chromatography/time of flight mass spectrometry (GC x GC/TOFMS) has been applied for the analysis of diesel fractions. Two GC x GC methods are suggested. One is applied for exhaustive characterization and the other is used for the fast separation and quantitation of groups. No sample cleaning-up was required for both methods. Besides hydrocarbon compounds, the distributions of sulfur compounds and nitrogen compounds in a catalytic cracked diesel oil were investigated using the developed method. A total of 27 nitrogen compounds (including indole, alkyl indoles, carbazole and alkyl carbazoles) and 42 sulfur compounds (including benzothiophene, alkyl benzothiophenes, dibenzothiophene and alkyl dibenzothiophenes) were identified based on TOFMS and retention index. Quantitative determination of non-aromatics, mono-, di- and tri-aromatics of four diesel oils has been performed. The results are in good agreement with those from ASTM D2425 method.