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Ultrasonic-assisted extraction of zeaxanthin from Lycium barbarum L. with composite solvent containing ionic liquid: Experimental and theoretical research

文献类型： 外文期刊

作者： Shen, Qiruonan 1 ; Zhu, Ting 1 ; Wu, Caie 3 ; Xu, Yujuan 2 ; Li, Chunmei 1 ;

作者机构： 1.Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan 430070, Hubei, Peoples R China

2.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Key Lab Funct Prod, Guangdong Key Lab Agr Prod Proc,Minist Agr, Guangzhou 510610, Peoples R China

3.Nanjing Forestry Univ, Coll Light Ind & Food Engn, Nanjing 210037, Jiangsu, Peoples R China

关键词： Zeaxanthin; Ultrasonic assistance; Ionic liquids; Extraction; Interaction mechanism

期刊名称：JOURNAL OF MOLECULAR LIQUIDS （ 影响因子：6.633； 五年影响因子：6.132 ）

ISSN： 0167-7322

年卷期： 2022 年 347 卷

页码：

收录情况： SCI

摘要： Zeaxanthin is the main active ingredient of Lycium barbarum L. The current extraction methods of zeaxanthin are not only tedious and time-consuming but also environmentally unfriendly. Therefore, in the present study, an efficient simultaneous extraction and saponification method for extracting zeaxanthin from L. barbarum was established by using the composite solvent composed of ionic liquid (IL), ethanol, and inorganic base with the assistance of ultrasonic waves. The yield of zeaxanthin was evaluated by high-performance liquid chromatography (HPLC). The optimal ionic liquid, [Hmim][OAc], was selected by combining experimental research with quantum chemical calculation. The extraction mechanism was investigated by quantum chemical calculations combined with density functional theory (DFT), atoms in molecules (AIM) and reduced density gradient (RDG) analyses, and the hydrogen bonds and van der Waals interactions between zeaxanthin and ILs were the main driving forces for ionic liquid extraction. The extraction conditions were optimized using single-factor and response surface methodology as follows: KOH concentration of 6.3%, ionic liquids concentration of 0.09 g/mL, ultrasonic treatment time of 39 min, solid-liquid ratio of 1:40, and the ultrasonic power of 420 W. Compared with the traditional extraction method, the newly established method improved the extraction yield by 23.08% and shortened the extracting time by 90%. Meanwhile, high purity of zeaxanthin could be easily recovered from the ILs solution. (C) 2021 Elsevier B.V. All rights reserved.

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