摘要
对白刺、沙棘、枸杞籽油的化学成分进行了对比研究。三种籽油的相对密度、折光指数、皂化价基本一致，碘价与脂肪酸的不饱和度呈正相关；采用HPLC法测定了3种脂溶性维生素，其中VA、VD3含量未检出，白刺、沙棘、枸杞籽油VE含量分别为（256±5）、（1687±23）、（124±4）IU／kg，差异非常显著；采用GC—MS法分析了三种籽油脂肪酸的化学组成和各成分含量，共鉴定出15种脂肪酸，占油脂总量的99．49％以上，其中不饱和脂肪酸总量分别高达92．27％、88．40％、90．73％，特别是多不饱和脂肪酸的种类、含量差异显著。结果表明，三种籽油具有较高的营养价值，值得进一步深度研究和开发利用。
The determination of characteristic indexes,fat-soluble vitamines and fatty acid compositions in seed oils of Nitraria, Seabuckthorn and Wolfbery in Qinghai-Tibetan Plateau was carried out. A comparative study of those Chemical Constituents was presented. The refractive index, relative density and saponification value of those seed oils are similar, and a positive correlation between characteristic indexes and degree of unsaturation of fatty acid in those seed oils is indicated. Three fat-soluble vitamines were determined by high performance liquid chromatography （HPLC）. The amount of Vitamine A and Vitamine D3 is not detected. The amount of Vitamine E in those seed oils of Nitraria, Seabuckthorn and Wolfbery is respectively （256±5）, （ 1687±23）, （ 124 ±4 ） IU/kg,and they are of great difference. The fatty acid compositions of those samples were respectively identified and quantified by gas chromatography（GC）-mass spectrometry （MS）. Fifteen fatty acids （ accounting for 99.49 % of total oil） were identified, and the amount of unsaturated fatty acids is respectively 92.27% ,88.40% ,90.73%. The types and contents of polyunsaturated fatty acids are significantly different. The amount of linoleic acid and α-linolenic acid in seed oil of Nitraria is respectively 69.70% ,0.95% , the amount of linoleic acid and α-linolenic acid in seed oil of Seabuckthom is respectively 40.74% ,22.68% ,the amount of linoleic acid, γ-linolenic acid and α-linolenic acid in seed oil of Wolfbery is respectively 67.33% ,2.12% , 0.77%. They are thus important dietary resources of functional fatty acids.
出处
《天然产物研究与开发》
CAS
CSCD
2010年第B08期16-20,共5页
Natural Product Research and Development
基金
中国科学院“西部之光”人才培养计划
关键词
白刺
沙棘
枸杞
籽油
特征指标
脂溶性维生素
脂肪酸成分
Nitraria
Seabuckthorn
Wolfbery
seed oil
characteristic index
fat-soluble vitamines
fatty acid compositions
