Abstract An edible oil was obtained from guava seeds by supercritical CO2 extraction. The oil was characterized by its fatty acid composition, physicochemical properties, and the contents of phenolic, miscellaneous, phytosterol, and tocopherol compounds. The oil, obtained with a yield of 8.6 ± 1.2 g oil/100 g guava seeds, had a high content of linoleic acid (78.5 %, w/w), followed by that of oleic acid (13.8 %, w/w). The guava seed oil had physicochemical properties comparable to those published in previous research, except for the low stability to oxidation. The chromatographic profile of the phenolic and miscellaneous compounds was dominated by vanillin (9.6 ± 0.3 mg/100 g oil) and cinnamaldehyde (9.4 ± 0.2 mg/100 g oil), followed by vanillic acid (3.9 ± 0.4 mg/100 g oil), cinnamic acid (2.4 ± 0.1 mg/100 g oil), and minor amounts of other phenolic aldehydes. Among the phytosterols and tocopherols, β-sitosterol (1048.9 ± 48.4 mg/100 g oil) and γ-tocopherol (82.6 ± 3.7 mg/100 g oil) were the most abundant. The low oxidative stability of the oil compared to that published in previous reports might reflect the high complexity of this matrix. This oil might have applications, directly or after blending with more stable edible oils.

中文翻译：

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通过超临界 CO2 萃取获得的番石榴 (Psidium guava) 种子食用油中的酚类化合物、生育酚和植物甾醇

摘要 采用超临界CO2萃取法从番石榴籽中提取食用油。该油的特征在于其脂肪酸组成、理化性质以及酚类、杂项、植物甾醇和生育酚化合物的含量。以 8.6 ± 1.2 g 油/100 g 番石榴种子的产量获得的油具有高含量的亚油酸（78.5 %，w/w），其次是油酸（13.8 %，w/w）。番石榴籽油的理化性质与先前研究中发表的性质相当，但氧化稳定性低。酚类和其他化合物的色谱图以香兰素（9.6 ± 0.3 mg/100 g 油）和肉桂醛（9.4 ± 0.2 mg/100 g 油）为主，其次是香草酸（3.9 ± 0.4 mg/100 g 油） , 肉桂酸 (2.4 ± 0.1 mg/100 g 油), 和少量的其他酚醛。在植物甾醇和生育酚中，β-谷甾醇（1048.9 ± 48.4 mg/100 g 油）和 γ-生育酚（82.6 ± 3.7 mg/100 g 油）含量最高。与先前报告中公布的相比，该油的低氧化稳定性可能反映了该基质的高度复杂性。这种油可能有应用，直接或与更稳定的食用油混合后。