Abstract
Fresh, raw milk fat was separated into polar and nonpolar glyceride fractions by silicic acid chromatography. The polar fraction contained the lactone precursor. Hydrolysis of this fraction at 140C for 30min resulted in the production of a series of saturated delta lactones of even-numbered chain lengths of from 8 to 18 carbon atoms. Gamma undecalactone was also identified. Presumptive evidence was obtained that the lactone precursor consists of hydroxy triglycerides.
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