文冠果油中脂肪酸成分的色-质谱法鉴定 . Identification of fatty acids in the kernel oil of Xanthoceras sorbifolia Bge. with GC-MS

Abstract

The fatty acid constituents of the kernel oil from Xanthoceras sorbifolia Bge. have been analyzed with GC-MS combined with urea adducts formation. Before analysis, the fatty acids in their mixture were synthesized to their 2-alkyl-substituted 4,4-dimethyl-oxazoline derivatives with a new technique of remote functional group (carboxyl group) chemical modification. Twelve kinds of fatty acids were identified locating the position of the double bonds in the unsaturated fatty acids. The structure of eicosa-11, 14-dienoic acid and tetracos-15-enoic acid were determined for the first time, and are uncommon unsaturated acids. This method possesses the advantages of accuracy, directness and rapidity. Two derivatizing methods were used and the results indicated that they had provided exactly the same information for the GC-MS analysis of structure of the derivatives.