Identification of engine oils using biomarkers by gas chromatography with mass spectrometric detection
https://doi.org/10.29235/1561-8331-2026-62-2-114-123
Abstract
Twelve samples of commercial engine oils of the same viscosity class 10w-40 were analyzed using gas chromatography with flame ionization and mass spectrometric detection (hereinafter referred to as GC/FID and GC/MSD, respectively). It was shown that the identification of engine oils by GC-FID, as well as GC/MSD with data collection in the total ion current mode, does not practically allow us to detect differences between the studied motor oils due to very minor differences in the recorded chromatograms of the corresponding samples. It is shown that the use of GC/MSD with the registration of chromatograms in the selected ion mode, characteristic of unique petroleum biomarkers, makes it possible to identify differences in the component composition of the considered oils. The obtained experimental data demonstrate the possibility of using a semi-quantitative assessment of the content of petroleum biomarkers for the identification of oils during forensic examination of petroleum products and fuels and lubricants (hereinafter referred to as PP and FL). Based on the content of biomarkers in commercial engine oils, it is also possible to detect adulteration of highly refined semi-synthetic or synthetic oils by substituting or mixing mineral oils made without proper processing.
About the Authors
S. N. Hramyka
State Forensic Examination Committee of the Republic of Belarus
Belarus
Belarus
Hramyka Siarhei N. – Deputy Head of Department.
43, Kalvariyskaya Str., 220073, Minsk
A. A. Ahabalayeu
Belarusian National Technical University
Belarus
Belarus
Ahabalayeu Aliaksandr A. – Ph. D. (Chemistry).
65, Nezavisimosti Ave., 220013, Minsk
M. F. Zayats
Belarusian State University
Belarus
Belarus
Zayats Mikhail F. – Dr. Sci. (Chemistry), Associate Professor, Head of the Department.
14, Leningradskaya Str., 220030, Minsk
S. M. Leshchev
Belarusian State University
Russian Federation
Russian Federation
Leschev Sergey M. – Dr. Sci. (Chemistry), Professor.
14, Leningradskaya Str., 220030, Minsk
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