永靖紫斑牡丹籽油与凤丹牡丹籽油理化性质与脂肪酸组成分析

Physicochemical properties and fatty acid compositions of seed oils of Paeoniarockii and Paeoniaostii cultivated in Yongjing

采用超声波辅助提取法对甘肃永靖产紫斑牡丹籽和凤丹牡丹籽中油脂进行提取,对其主要理化指标进行测定,采用气相色谱-质谱联用仪对其脂肪酸组成进行分析。结果表明:紫斑牡丹籽与凤丹牡丹籽得油率分别为(27.08±3.09)%和(28.69±2.69)%,紫斑牡丹籽油与凤丹牡丹籽油酸值(KOH)、碘值(I)、皂化值(KOH)、过氧化值分别为(2.13±0.08)、(2.05±0.11)mg/g;(178.13±3.18)、(172.56±3.58)g/100 g;(188.23±3.49)、(183.56±3.29)mg/g和(1.47±0.06)、(1.55±0.04)mmol/kg,符合粮食行业标准LS/T 3242—2014《牡丹籽油》。紫斑牡丹籽油与凤丹牡丹籽油的主要脂肪酸组成相似,以亚麻酸、亚油酸、油酸、硬脂酸和棕榈酸为主,不饱和脂肪酸含量均接近90%,其中ω-3系列亚麻酸的含量尤其突出,分别达到44.90%和47.48%,远高于世界卫生组织推荐的多不饱和脂肪酸含量高于8.00%的保健型营养油脂标准。综合分析,永靖紫斑牡丹籽油和凤丹牡丹籽油是优质的ω-3脂肪酸保健食用油。

The seed oils of Paeoniarockii and Paeoniaostii cultivated in Yongjing, Gansu province were extracted by ultrasound - assisted extraction method, and the main physicochemical indexes of Paeoniar- ockii seed oil and Paeoniaostii seed oil were determined, also the fatty acid compositions were analyzed by GC - MS. The results indicated that the oil yields of Paeoniarockii seed and Paeoniaostii seed were （27.08 ± 3.09 ） % and （28.69 ± 2.69 ） %, respectively. The physicochemical indexes of Paeoniarockii seed oil and Paeoniaostii seed oil were： acid values （2.13 ±0.08）, （2.05 ±0.11 ） mgKOH/g, iodine values （178.13 ±3.18）, （ 172.56 ± 3.58） gI/100 g, saponification values （ 188.23 ± 3.49）, （ 183.56±3.29） mgKOH/g, peroxide values （ 1.47 ±0.06 ）, （ 1.55 ± 0.04 ） mmol/kg, which were accordance with the grain industry standard of LS/T 3242-2014 Peony Seed Oil. The main fatty acids of Paeoniar- ockii seed oil were linolenic acid, linoleic acid, oleic acid, stearic acid and palmitic acid, which was similar to that of Paeoniaostii seed oil. The contents of unsaturated fatty acids in Paeoniarockii seed oil and Paeoniaostii seed oil were close to 90%, in which ω-3 series linolenic acids accounted for 44.90% and 47.48%, respectively, far higher than 8.00% of the provision of the healthcare nutritional oil recommended by WHO. Through comprehensive analysis,the Yongjing Paeoniarockii seed oil and Paeoniaostii seed oil were extremely high - quality health edible oil rich in ω-3 fatty acid.