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2. 2. AOCS, “Official Methods and Recommended Practices of the American Oil Chemists' Society”, 4th ed., 1998, AOCS Press, Champaign, IL.
3. 3. IUPAC, “Standard Methods for the Analysis of Oils, Fats and Derivatives”, 7th ed., 1992, Blackwell Scientific, London.
4. Rapid quantitative determination of free fatty acids in fats and oils by fourier transform infrared spectroscopy
5. New FTIR method for the determination of FFA in oils