全二维气相色谱-四级杆质谱联用分析吉林市售汽油组分

用全二维气相色谱-四级杆质谱联用(GC×GC-qMS)对汽油样品进行定性、定量分析，考察了进样方式、程序升温和调制周期3个因素对分离效果的影响。用6种直链烷烃、2种烯烃、2种环烷烃和11种芳香烃组成的混合标准溶液对各族组分的响应值进行校正。结果表明：汽油样品中直链烷烃、支链烷烃、环烷烃、烯烃、烷基苯、茚系和萘系等各族组分在优化条件下均得到较好分离；采用优化方法对吉林市采集到的92^#、95^#、98^#汽油样品进行组分分析，实现了对3种标号汽油样品的识别；GC×GC-qMS适用于组分接近的复杂体系样品的分析，是一种可实现汽油成分精确表征的实用方法。

Analysis of Gasoline Collected in From Gas Station of in Jilin by Comprehensive Two-Dimensional Gas Chromatography Coupled With Quadrupole Mass Spectrometry

A method of comprehensive two-dimensional gas chromatography coupled with quadrupole mass spectrometry has been developed for the qualitative and quantitative analysis of fluid catalytic cracking gasoline. Common chromatographic conditions such as injection mode, program heating conditions and modulation period, which possess significant impact on the separation of gasoline components, are discussed in this paper. The corresponding quantitative determination is achieved by external standard method. Different classes of compounds have different response factors, which were modified by mixed standard solution, including 6 kinds of n-alkanes, 2 kinds of olefins, 2 kinds of cycloalkanes and 11 kinds of aromatics. Main components of fluid catalytic cracking gasoline, including n-alkanes, i-alkanes, olefins, cycloalkanes, alkylbenzenes, indanes, tetralins, naphthalene and alkylnaphthalenes, are all accurately separated and determinated by GC×GC-qMS analysis. And the optimized method is successfully applied to analyze the components of 92^#, 95^# and 98^# gasoline samples collected from Jilin City. This method is of low detection limits, high sensitivity and efficiency, huge peak capacity and simple operation. Results show that the proposed method is suitable for the separation of complex samples and qualitative and quantitative analyses of fluid catalytic cracking gasoline.