Luminescence spectral properties and chromatography of linseed oils with different storage periods
Year: 2025
Type: article
Abstract: The paper focuses on luminescence spectral properties of linseed oils obtained by the cold pressing method with different storage periods.We noted the high value of oil fluorophores (phenols, tocopherols, polyunsaturated fatty acids, vitamins, pigments) in conveying information about their original state depending on the time of oil storage in household conditions.It has been established that long-term storage of oil (more then 2 years) leads to: a) oxidation and decay of phenols, tocopherols, polyunsaturated fatty acids (linoleic, linolenic, arachidonic), vitamins (B2, E), carotene (precursor of vitamin A), chlorophyll pigment, accompanied by a decrease in the intensity of the luminescence bands of phenol, tocopherol, and chlorophyll pigment; b) an increase in the intensity of the luminescence bands of the oxidation products of these components peaking at λmax= 370, 390, 415, 430, 470, 515, 568 and 590 nm with a change in the structure of the luminescence excitation spectra of these fluorophores.The fatty acid composition of linseed oils was determined by using the gas chromatography method, using a 7890 B gas chromatograph (Agilent Technologies), equipped with a zb-FAME capillary column (manufactured by Phenomenex, USA), 20 m long, internal diameter 0.18 mm, phase thickness 0.15 µm.Helium was used as the carrier gas.
Source: Journal of Physical Studies
DOI: 10.30970/jps.29.2802
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4410240121