全二维气相色谱-质谱分析煤油基吸热型碳氢燃料烃族组成  

Analysis of kerosene-based endothermic hydrocarbon fuel using comprehensive two-dimensional gas chromatography coupled to mass spectrometry

作　　者：李海静[1] 刘国柱[1] 张香文[1] LI Haijing;LIU Guozhu;ZHANG Xiangwen(Key Laboratory of Green Chemical Technology of Ministry of Education, Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学绿色合成与转化教育部重点实验室,天津300072

出　　处：《色谱》2018年第8期780-785,共6页Chinese Journal of Chromatography

基　　金：国家自然科学基金(21522605)~~

摘　　要：采用全二维气相色谱-质谱联用(GC×GC-MS)考察了色谱柱系统、程序升温条件和调制周期3个主要因素对样品组分分离结果的影响,建立了煤油基吸热型碳氢燃料烃族组成的定性分析方法,并利用GC×GC-FID通过有效碳数校正因子对烃族组成进行定量。对选取的9种燃料的分析结果表明,该方法对链烷烃和环烷烃的定量结果与标准方法 ASTM D2425的结果高度一致,相对误差基本均在±10%以内。利用该方法计算的碳含量结果与元素分析法相比误差均在0.5%以下。该方法无需复杂的前处理,稀释后可直接进样分析,操作简单,而且可直观地看出不同样品之间的差异,为改进燃料的性能提供了必要的分析手段。Hydrocarbon fuels are mainly composed of n-alkenes,iso-alkanes,cycloalkanes(primarily single-and double-ring),alkylbenzenes,indans,tetralins,naphthalene,and alkylnaphthalenes.Different hydrocarbon classes impart different properties to a fuel.An identification method of hydrocarbon classes in kerosene-based endothermic hydrocarbon fuel was established using comprehensive two-dimensional gas chromatography coupled to mass spectrometry(GC×GC-MS).Moreover,the corresponding quantitative determination was achieved using the effective carbon number correction factors of GC×GC-FID.The effects of the main chromatographic conditions such as the column system,program heating conditions,and modulation period on the separation of fuels were discussed.Nine hydrocarbon fuels were analyzed.The results showed that the contents of paraffin and cycloalkanes are consistent with the results obtained using the standard test method ASTM D2425.The relative error is within±10%.The carbon content calculated using this method has an error of less than 0.5%compared with the elemental analysis method.This method does not require complicated pretreatment,and the sample can be injected directly after dilution.Compared with the traditional GC-MS,the operation is simple,and the differences among various samples can be observed intuitively,which helps in improving the performance of the fuel.

关 键 词：全二维气相色谱 烃族组成 碳氢燃料 

分 类 号：O658[理学—分析化学]