Abstract: ¹H NMR spectra of five kinds of plant oils and the ¹H spin-lattice relaxation time T₁ of CCH₂C functional group have been obtained in this paper. The number of functional groups, the unsaturation degree, the esterification degree for each mole of oil have also been calculated. ¹³C NMR spectra of soybean oil and tea oil have been recorded. From these ¹³C NMR spectra, we have calculated the ratios of each functional group to methyl group, which agree with the results obtained by ¹H NMR quite well, and the mole percentage of saturated and unsaturated fatty acid glycerides in the two oils.

Key words: ¹H NMR, ¹³C NMR, Saturated fatty acid glycerides, Unsaturatcd fatty acid glycerides, Estimation of integration