石油烃类组成的GC-MS分析

Determination of hydrocarbon types in petroleum distillates by GC-MS

本文建立了石油馏分烃类组成的GC-MS分析方法。油品试样需要预先分离成饱和烃和芳烃馏分,再分别进行质谱测定。样品通过空心毛细柱直接进入质谱分析,分别获得饱和烃和芳烃馏分的混合物质谱图。根据各烃类化合物的特征质量峰强度加和及灵敏度系数建立多元联立方程组,计算各类烃的百分含量。专用定量软件几分钟可给出测试结果,该方法快速、简便而准确。

A determination method of hydrocarbon types in petroleum distillates by GC-MS was established. The oil samples were separated into saturate and aromatic fractions, and then each fracton was analyzed by mass spectrometry. Sample through the empty capillary column directly went into the mass spectrometry and was detected. The analysis was based on the summa- tion of characteristic mass fragments to determine the concentration of hydrocarbon types. Special quantitative software could give the results only a few minutes. This method is simple, fast and accurate.