8种云南植物油脂肪酸的气相色谱-质谱测定

发布时间：2019-06-05 15:23

【摘要】：采用气相色谱-质谱联用(GC-MS)方法测定了8种云南植物油脂肪酸含量并对其差异性进行了分析。植物油经甲酯化处理后,用GC-MS方法测定其脂肪酸含量。通过与标准样品保留时间比较和检索NIST标准谱库定性,峰面积归一化法定量。山茶油和辣木籽油含油酸(C18:1)较高,油酸含量分别为80.47%和71.90%;核桃油和假酸浆籽油含亚油酸(C_(18:2))较高,含量分别为60.75%和70.78%;香薷油和藿香籽油含α-亚麻酸(C_(18:3))较高,含量分别为47.13%和55.08%。橡胶树籽油中硬脂酸(C_(18:0))含量9.22%,油酸(C_(18:1))24.07%,亚油酸(C_(18:2))37.17%,α-亚麻酸(C18:3)19.72%,几种脂肪酸分布较为均匀。藿香籽油中不饱和脂肪酸(UFA)含量最高为93.75%。辣木籽油饱和脂肪酸(SFA)含量最高为23.29%;辣木籽油中花生酸(C_(20:0))、二十碳烯酸(C_(20:1))、榆树酸(C_(22:0))和木蜡酸(C_(24:0))含量分别为3.94%、2.73%、6.41%和1.10%,均远远高于其他7种植物油相对应的脂肪酸含量,可作为鉴定辣木籽油的重要依据。
[Abstract]:The fatty acid contents of eight Yunnan vegetable oils were determined by gas chromatography-mass spectrometry (GC-MS) and their differences were analyzed. The fatty acid content of vegetable oil was determined by GC-MS after methyl esterification. By comparing with the retention time of the standard sample and searching the NIST standard spectrum database qualitatively, the peak area normalization method is used to quantify the standard spectral database. Camellia oleifera oil and horseradish seed oil contained higher oleic acid (C 18 鈮，

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