IODINE VALUES ESTIMATION OF VEGETABLE OILS BY FTIR SPECTROSCOPY

A rapid and simple method for the estimation of the iodine values (IV) of vegetable oils by FTIR spectroscopy was developed and tested. Iodine values of 12 edible oils from local supermarket were measured by thiosulfate titration and correlated with spectral data from FTIR. The absorbance values of carbon-carbon double bond at 1654 cm^-1 (A_C=C) and carbonyl group (A_C=O) at 1746 cm^-1 and 3470 cm^-1 were correlated with IV. The intensities of the carbon-carbon double bond fundamental and the carbonyl group overtone absorption bands provide the best linear regressions IV = 63.37× A_C=C/ A_C=O– 29.5; R=0.956.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.