Deep eutectic solvent-based valorization of spent coffee grounds
| Autor: | Kyung Min Jeong, Da Eun Yoo, Eun Mi Kim, Se Young Han, Yan Jin, Jeongmi Lee |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Flavonoids
chemistry.chemical_classification Chromatography Central composite design Plant Extracts 010405 organic chemistry 010401 analytical chemistry Extraction (chemistry) Flavonoid Fractional factorial design Green Chemistry Technology General Medicine Coffee 01 natural sciences 0104 chemical sciences Analytical Chemistry Deep eutectic solvent chemistry.chemical_compound Phenols chemistry Solvents Response surface methodology Food Science Eutectic system Choline chloride |
| Zdroj: | Food Chemistry. 255:357-364 |
| ISSN: | 0308-8146 |
| DOI: | 10.1016/j.foodchem.2018.02.096 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect