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September 2025 (published: 16.09.2025)
Number 3(65)
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Fourier methods of IR spectroscopy and refractometry in the study of industrial modified and natural vegetable oils
Alla P. Nechiporenko, Vеsо O.S., Liudmila V. Plotnikova, Ситникова В. Е., Alexey S. Bidny
Keywords: vegetable oils; trans isomers; optical properties of liquid vegetable oils; Fourier infrared spectroscopy
Acknowledgement: The authors thank Dr. Sci. (Eng.) I. E. Minevich, Chief Researcher at the Federal Scientific Center for Bast Fiber Crops, for providing samples of flax seeds
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
Fourier methods of IR spectroscopy and refractometry in the study of industrial modified and natural vegetable oils
Using Fourier infrared spectroscopy and refractometry, we made a comparative study of the optical properties for the extended series of samples of liquid vegetable oils – non-industrial, freshly squeezed from seeds by the pressing method, natural industrial unrefined, and refined from different manufacturers and classification groups, depending on the conditions of their heat treatment, industrial samples of oils modified by oxidation, polymerization, hydrogenation, and their blends. Compared to the spectra of a number of samples of oilseeds and nuts, as well as 5-day-old hemp seedlings, the transformation of the natural system of cis-trans-conjugated fatty acid double bonds into trans-isolated conformations of a technogenic nature – mechanical cold pressing, refining, and heat treatment – is illustrated.
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Keywords: vegetable oils; trans isomers; optical properties of liquid vegetable oils; Fourier infrared spectroscopy
Acknowledgement: The authors thank Dr. Sci. (Eng.) I. E. Minevich, Chief Researcher at the Federal Scientific Center for Bast Fiber Crops, for providing samples of flax seeds
DOI 10.17586/2310-1164-2025-18-3-79-112
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License