Valorization of Spent Coffee Grounds: Comparing Phenolic Content and Antioxidant Activity in Solid-Liquid vs. Subcritical Water Extraction Methods
The aim of this work was to extract phenolic compounds (PCs) from spent coffee grounds (SCGs) using two different methods (solid-liquid extraction (SLE) and subcritical water extraction (SWE)) and compare their total phenolic content (TPC) and their antioxidant activity (AA) by 1,1-diphenyl-2 picryl...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Biology and Life Sciences Forum |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-9976/40/1/23 |
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| Summary: | The aim of this work was to extract phenolic compounds (PCs) from spent coffee grounds (SCGs) using two different methods (solid-liquid extraction (SLE) and subcritical water extraction (SWE)) and compare their total phenolic content (TPC) and their antioxidant activity (AA) by 1,1-diphenyl-2 picrylhydrazyl radical (DPPH<sup>•</sup>), 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS<sup>•+</sup>) scavenging activities, and ferric reducing antioxidant power (FRAP) assay. The SWE extracts displayed higher TPC values and higher scavenging activity in the DPPH<sup>•</sup> and ABTS<sup>•+</sup> assays. The SLE extracts displayed a higher ferric reducing power. These results highlight the impact of the extraction method in PCs extraction and the antioxidant power of the extracts produced. |
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| ISSN: | 2673-9976 |