Determination of Iodine Value in Ethylic Biodiesel Samples by 1H-NMR

Abstract: An alternative method for the determination of iodine value in biodiesel samples obtained via ethylic route is proposed in this work. The method is based on the 1H NMR spectra where areas of the hydrogen signals observed at specific chemical shifts are integrated. The results demonstrated that there is a good correlation between data obtained by the traditional method and 1H NMR (r2 = 0.9389 and r = 0.9691). The model was considered satisfactory and applicable to ethylic biodiesel samples obtained from different raw materials