Abstract
The mass spectrometric investigation was undertaken to analyse qualitatively aromatic hydrocarbons and thiophenic sulfur compounds separated from the aromatic fraction in high boilingrange of petroleum. The identification of the compound types was made by the characteristics of cleavage mechanism of aromatic hydrocarbons and thlophenic sulfur compounds under electron bombardment and the results of low voltage ionization method. By this method, alkylbenzene, alkyl monocyclobenzene, alkylnaphthalene, alkylphenanthrene, alkylbenzothiophene, alkyl 2, 3-dihyd obenzothiophene, alkyl dibenzothiophene and alkyl tetrahydrodibenzothiophene were determined.
