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September 2025 (published: 16.09.2025)
Number 3(65)
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Rubidium, strontium, lithium as indicators of place of origin and method of production for valuable edible vegetable oils
Vasilyev Vladimir A., Resnyanskaya Anna S.
Keywords: edible vegetable oils; pumpkin; melon; watermelon; place of origin; rubidium; strontium; lithium
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
Rubidium, strontium, lithium as indicators of place of origin and method of production for valuable edible vegetable oils
The content of rubidium, strontium, and lithium was determined in samples of pumpkin, watermelon, melon, and black cumin oils in order to assess the possibility of using the obtained melons to identify the origin of the oils and their manufacturer. Seven samples of oils obtained from raw materials grown in the Astrakhan region, as well as grape seed oil from the Krasnodar region, were studied using a highly sensitive method of atomic adsorption with electrothermal atomization of the sample using the Zeeman effect and tantalum ballast. The melon oil was obtained by pressing with a manual press by the authors of the article, and the grape seed oil was obtained from industrial production. As an alternative example, refined deodorized sunflower oil purchased from a nearby chain grocery store was also studied. A distinctive feature of Rb, Sr, and Li is that their content is independent of anthropogenic factors: the use of fertilizers, herbicides, the materials of the agricultural machinery or technological equipment, etc. The level of these metals in raw materials and oils depends only on their natural regional geochemical presence in soils. It has been shown that microelement analysis of premium cold-pressed vegetable oils, along with other modern methods, is an important element in the overall system of identifying their authenticity.
Keywords: edible vegetable oils; pumpkin; melon; watermelon; place of origin; rubidium; strontium; lithium
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License