Chromatographic analysis of seed oils. II. fatty acid composition of dimorphotheca oil

Abstract

The fatty acid composition of Dimorphotheca sinuata seed oil was determined by use of column and gas-liquid chromatography (GLC), and UV, IE, and nuclear magnetic resonance (n.m.r.) spectroscopy. The presence of a small amount of epoxy esters was confirmed by n.m.r. spectroscopy in conjunction with GLC and TLC. The presence of ca. 2.5% of 9-keto -trans,trans- 10,12-octadeca-dienoic acid, previously unrecognized as a constituent of dimorphotheca oil, was established. The estimated fatty acid composition of dimorphotheca oil is 66.5% dimorphecolic, 14% linoleic, 10% oleic, 4.5% palmitic and stearic, and 5% miscellaneous acids. © 1964 American Oil Chemists' Society.