An Efficient Deacidification Process for Safflower Seed Oil with High Nutritional Property through Optimized Ultrasonic-Assisted Technology

文献类型： 外文期刊

第一作者： Xin, Leyu

作者： Xin, Leyu;Zhang, Zepeng;Cai, Chenyang;Yang, Yongxing;Lian, Yali;Yang, Haiyan;Xin, Leyu;Guo, Limin;Edirs, Salamet;Cai, Chenyang;Xin, Leyu;Guo, Limin;Edirs, Salamet

作者机构：

关键词： safflower seed oil; random centroid optimization; ultrasonic-assisted ethanol extraction deacidification; lipid concomitants; antioxidant capacity

期刊名称：MOLECULES （ 影响因子：4.927； 五年影响因子：5.11 ）

ISSN：

年卷期： 2022 年 27 卷 7 期

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收录情况： SCI

摘要： Safflower seed oil (SSO) is considered to be an excellent edible oil since it contains abundant essential unsaturated fatty acids and lipid concomitants. However, the traditional alkali-refined deacidification process of SSO results in a serious loss of bioactive components of the oil and also yields massive amounts of wastewater. In this study, SSO was first extracted by ultrasonic-assisted ethanol extraction (UAEE), and the extraction process was optimized using random centroid optimization. By exploring the effects of ethanol concentration, solid-liquid ratio, ultrasonic time, and the number of deacidification times, the optimum conditions for the deacidification of safflower seed oil were obtained as follows: ethanol concentration 100%, solid-liquid ratio 1:4, ultrasonic time 29 min, and number of deacidification cycles (x2). The deacidification rate was 97.13% +/- 0.70%, better than alkali-refining (72.16% +/- 0.13%). The values of acid, peroxide, anisidine and total oxidation of UAEE-deacidified SSO were significantly lower than those of alkali-deacidified SSO (p < 0.05). The contents of the main lipid concomitants such as tocopherols, polyphenols, and phytosterols in UAEE-decidified SSO were significantly higher than those of the latter (p < 0.05). For instance, the DPPH radical scavenging capacity of UAEE-processed SSO was significantly higher than that of alkali refining (p < 0.05). The Pearson bivariate correlation analysis before and after the deacidification process demonstrated that the three main lipid concomitants in SSO were negatively correlated with the index of peroxide, anisidine, and total oxidation values. The purpose of this study was to provide an alternative method for the deacidification of SSO that can effectively remove free fatty acids while maintaining the nutritional characteristics, physicochemical properties, and antioxidant capacity of SSO.

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