Deep eutectic solvent-based valorization of spent coffee grounds

被引：113

作者：

Yoo, Da Eun ^{[1
]}

Jeong, Kyung Min ^{[1
]}

Han, Se Young ^{[1
]}

Kim, Eun Mi ^{[1
]}

Jin, Yan ^{[1
]}

Lee, Jeongmi ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Pharm, Suwon 16419, Gyeonggi Do, South Korea

来源：

FOOD CHEMISTRY | 2018年 / 255卷

基金：

新加坡国家研究基金会;

关键词：

Spent coffee grounds; Deep eutectic solvents; Phenolic compounds; Anti-oxidant activity; Two-level fractional factorial design; Response surface methodology; MICROWAVE-ASSISTED EXTRACTION; NATURAL ANTIOXIDANTS; PHENOLIC-COMPOUNDS; ULTRASOUND; OPTIMIZATION; FLAVONOIDS; RECOVERY; ABTS;

D O I：

10.1016/j.foodchem.2018.02.096

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Spent coffee grounds (SCGs) are viewed as a valuable resource for useful bioactive compounds, such as chlorogenic acids and flavonoids, and we suggest an eco-friendly and efficient valorization method. A series of choline chloride-based deep eutectic solvents (DESs) were tested as green extraction solvents for use with ultrasound-assisted extraction. Extraction efficiency was evaluated based on total phenolic content (TPC), total flavonoid content, total chlorogenic acids, and/or anti-oxidant activity. A binary DES named HC-6, which was composed of 1,6-hexanediol: choline chloride (molar ratio 7:1) was designed to produce the highest efficiency. Experimental conditions were screened and optimized for maximized efficiency using a two-level fractional factorial design and a central composite design, respectively. As a result, the proposed method presented significantly enhanced TPC and anti-oxidant activity. In addition, phenolic compounds could be easily recovered from extracts at high recovery yields (> 90%) by adsorption chromatography.

引用

页码：357 / 364

页数：8

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