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利用质谱法对炭化中间相产物中多环芳烃(PAH)的组成及分布进行了考察。用六或七个芳核类型(芳环数为三至六)表征了多环芳烃的组成。其主要组分为含有一或两个取代基(甲基、乙基)的三至六环的PAH,其分子量分布范围为200—350,主要集中在270左右。所得结果与~1H-NMR波谱法的平均结构表征的数据相符合。
The composition and distribution of polycyclic aromatic hydrocarbons (PAHs) in carbonized mesophase products were investigated by mass spectrometry. The composition of polycyclic aromatic hydrocarbons is characterized by six or seven aromatic nuclei (aromatic rings of three to six). Its main component is a three to six-ring PAH containing one or two substituents (methyl, ethyl) with a molecular weight distribution in the range of 200-350 and predominantly around 270. The results obtained are in agreement with the data of the average structure characterization by ~ 1H-NMR spectroscopy.