| 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 Paeoniarockii 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±329) 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 Paeoniarockii 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 Paeoniaostiiseed oil were extremely high-quality health edible oil rich in ω-3 fatty acid. |
