Compositional indicators in palm oil fatty acid chemistry. How relevant is the iodine value? Iodine value ‒ A structural indicator of the purity of crude palm oil from D×P and O×G cultivars
The different species of fatty acids that comprise the molecular structures of the triglycerides in palm oil, at different conjugation levels that vary among cultivars (D×P and O×G), turn out to be chemical indicators clo- sely related to the iodine value, a quality parameter that determines the degree of unsaturations or the average number of double bonds in oils and fats, with values that can exceed 60 units in fatty compounds with a high content of monounsaturated and polyunsaturated fatty acids. In this study, blends were formed between crude palm oil extracted from tenera D×P type palm cultivars of Elaeis guineensis Jacq. and from four cultivars of O×G interspecific hybrids, at different compositional levels (0, 20, 40, 60, 80 and 100 % m/m-CPO O×G). The lipid profile of pure oils and mixtures generated under controlled laboratory conditions was established by gas chromatography with flame ionization detector, while the iodine value was calculated stoichiometrically from chromatograms obtained. The results were analyzed to determine the possible relationship between the iodine value and the chemical compositional variations in the lipid profile achieved in the CPO with the mixtures, by means of simple linear regressions. From the results, three linear regression models were obtained for the mixtures between: CPO O×G Manaos × Compacta and CPO D×P; between CPO O×G Coari × Super Tenera and CPO D×P; and between CPO O×G Coari × La Mé and CPO D×P, with coefficients of determination (R²) of 0.9852, 0.9845 and 0.9871, respectively.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Fedepalma
2022
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| Online Access: | https://publicaciones.fedepalma.org/index.php/palmas/article/view/13711 |
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