Ultrahigh-Resolution Mass Spectrometry Analysis of Ozonation Products of Petroleum Nitrogen Compounds

Abstract

Changes that occur at the molecular level in the composition of nitrogen compounds of a petroleum sample from the Yuzno-Yagunskoe field during ozonation have been studied by ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry in soft ionization modes. It has been found that N₁O_x-containing products accumulate to form new classes of compounds, namely, N₁O₂, N₁O₃, N₁O₄, N₁O₅, N₁O₆, and N₁O₇, while N₁ classes undergo degradation. Ozonation of 50% of the feedstock leads to a ~30% decrease in the number of identified empirical formulas of pyridine bases (N₁ class).