关键词: 沙棘籽油, 沙棘果油, 脂肪酸, 气相色谱-质谱

Abstract: Fatty acid compositions of Fructus Hippophae pulp and seed oils respectively were identified and quantified by gas chromatography(GC)-mass spectrometry(MS).A comparative study of major fatty acids respectively extracted from pulp and seed was presented.A base-catalyzed transesterification method was used to convert fatty acids to methyl esters.Fifty-four peaks were eluted by an INNOWAX capillary column and 35 fatty acids(accounting for 99.6% of total oil) were identified by GC-MS.The components were determined by normalization method.Significant differences of the components were found between pulp and seed oils.The amount of saturated fatty acids in seed oil and pulp oil is respectively 32.54 % and 13.10% approximately 2.5 times higher than that in seed oil,while the amount of unsaturated fatty acids is respectively 66.92 % and 86.52%,the amount of monounsaturated fatty acids is respectively 53.71% and 26.05%,and the amount of polyunsaturated fatty acids is respectively 13.21% and 60.47%.It is thus an important dietary resource of functional fatty acids.

Key words: Fructus Hippophae pulp oil, Fructus Hippophae seed oil, fatty acids, GC-MS