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An improved Raman spectroscopic procedure for the determination of the total unsaturation in oils and fats using Fourier Transform Raman {FT-Raman} spectroscopy is described. An important advantage of FT-Raman for these samples is that the spectra are fluorescence-free unlike dispersive Raman which often uses visible excitation. Samples can be analyzed without any pre-treatment thus eliminating the need for dissolution in toxic solvents. The short acquisition time of FT-Raman and the ease of application allowed for a rapid sample turnover. KEY WORDS: Dispersive Raman, fluorescence, FT-IR, FT-Raman, iodine value, unsaturation.

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