榧籽油的金松酸结构鉴定及成分分析

Structural identification of sciadonic acid and component analysis of Torreya grandis seed oil

通过红外光谱法和气相色谱-质谱联用法分析了榧籽油所含的特殊脂肪酸——金松酸的结构,并对不同产地香榧籽油和木榧籽油的脂肪酸和主要微量成分组成进行了分析。结果表明:榧籽油主要含有亚油酸(39.85%~46.15%)、油酸(22.68%~35.10%)、金松酸(9.13%~12.96%)、棕榈酸(7.34%~8.22%)、硬脂酸(2.64%~3.03%)等9种脂肪酸;其中,金松酸是一种特殊脂肪酸,其结构为顺5,11,14-二十碳三烯酸;榧籽油主要含有β-生育酚(1 325.75~1 769.06 mg/kg)、β-谷甾醇(921.87~1 167.91 mg/kg)、α-生育酚(208.69~272.20 mg/kg)等7种微量成分。

The structure of the special fatty acid contained in Torreya grandis seed oil, sciadonic acid, was analyzed by FT-IR and GC-MS, and the fatty acid composition and main trace components of Torreya grandis seed oil from different origins were analyzed. The results showed that Torreya grandis seed oil mainly contained nine kinds of fatty acids, such as linoleic acid （39.85%-46.15%）, oleic acid （22.68%-35.10%）, sciadonic acid （9.13%-12.96%）, palmitic acid （7.34%-8.22%）, and stearic acid（2.64%-3.03%）. Sciadonic acid was a special fatty acid, and its structure was cis-5,11,14-eicosatrienoic acid. In addition, Torreya grandis seed oil mainly contained seven kinds of trace components, such as β-tocopherol （1 325.75-1 769.06 mg/kg）, β-sitosterol（921.87-1 167.91 mg/kg）, and α-tocopherol（208.69-272.20 mg/kg）, etc.