精炼工艺对元宝枫籽油品质的影响

Effects of refining process on the quality of Acer truncatum seed oil

为了对元宝枫籽油的精炼提供指导,分析了精炼过程中元宝枫籽油的基本理化指标、脂肪酸和有益油脂伴随物(植物甾醇、生育酚)的变化情况。结果表明:随着精炼工序的进行,元宝枫籽油的酸值、过氧化值和氧化诱导期显著降低(p<0.05),脂肪酸组成变化不显著(p>0.05),植物甾醇和生育酚两种有益油脂伴随物的含量显著降低(p<0.05),分别由毛油的950.3 mg/kg和1107.4 mg/kg降至脱臭油的569.9 mg/kg和743.4 mg/kg,损失率分别为40.0%、32.9%。研究结果说明精炼能够显著影响元宝枫籽油的品质,应有效控制脱臭条件,尽量减少有益油脂伴随物的损失。

In order to provide guidance on the refining of Acer truncatum seed oil,the changes of the physicochemical indexes,fatty acids and beneficial concomitants(phytosterols,tocopherols)during the refining process were analysed.The results showed that the acid value,peroxide value and oxidation induction period of Acer truncatum seed oil decreased significantly(p<0.05)with the refining process,the fatty acid composition was not significantly changed(p>0.05),and the contents of phytosterols and tocopherols decreased significantly(p<0.05)from 950.3 mg/kg and 1107.4 mg/kg in the crude oil to 569.9 mg/kg and 743.4 mg/kg in the deodorized oil,respectively.The loss rates of the phytosterols and tocopherols were 40.0%and 32.9%,respectively.The results indicated that refining could significantly affect the quality of Acer truncatum seed oil and the deodorization conditions should be effectively controlled to minimize the loss of beneficial concomitants.