We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Peculiarities of the lipid composition of sunflower wax.
- Authors
Oseyko, Mykola; Romanovska, Tetiana; Shevchyk, Vasyl
- Abstract
Introduction. The purpose of this study is to determine the peculiarities of the lipid composition of sunflower wax separated from crude and refined oil. Materials and methods. Waxes were separated from triacylglycerols by silica gel column chromatography. Wax compositions were determined by gas-liquid chromatography with flame ionization detection. The column was thermostatted in a given mode at temperatures from 170 to 380 C. Results and discussion. The article presents experimental data for determining the composition of waxes in crude and refined sunflower oil. Gas-liquid chromatography conditions described in the study methodology expanded the range of detection of long-chain waxes. New data have been obtained about sunflower oils consisting of waxes containing 50 or more carbon atoms. Waxes with hydrocarbon chain lengths of 44-56 carbon atoms (C44 to C56) have been identified in crude sunflower oil. In crude sunflower oil, waxes with chain lengths ranging from 46 to 52 carbon atoms (С46, С48, С50, and С52) account for up to 61% of the total waxes. Identified waxes with even numbers of carbon atoms accounted for 82% of the total waxes. Crude sunflower oil was found to have the highest content of wax with 48 carbon atoms (C48) of chain length. Refined sunflower oil showed a decrease in the content of wax compounds by an order of magnitude. The refining process removed waxes with shorter C44 and C46 hydrocarbon chains. Refined sunflower oil contains trace amounts of waxes with chain lengths ranging from 48 to 54 carbon atoms (С48, С49, С50, С51, С52, С53, and С54). Moreover, the predominance of chains with even numbers of carbon atoms over those with odd numbers of carbon atoms in refined sunflower oil is emphasized. Refined sunflower oil is dominated by waxes with chain lengths of 50, 52 and 54 carbon atoms (С50, С52, and С54). The acid and iodine values, the saponification number and the wax melting point have been analyzed, which are in line with an identified composition of sunflower wax. Conclusion. The dependence of wax content on the chain lengths with even and odd numbers of carbon atoms both in crude and refined sunflower oil is parabolic.
- Subjects
SUNFLOWER seed oil; NORMAL-phase chromatography; WAXES; GAS chromatography; ODD numbers; SUNFLOWERS
- Publication
Ukrainian Journal of Food Science, 2021, Vol 9, Issue 2, p236
- ISSN
2310-1008
- Publication type
Article
- DOI
10.24263/2310-1008-2021-9-2-10