RT Journal Article
T1 Extraction, identification and quantification of polyphenols from spent coffee grounds by chromatographic methods and chemometric analyses
T2 Extracción, identificación y cuantificación de polifenoles en posos del café mediante métodos cromatográficos y análisis quimiométrico
A1 Ramón-Gonçalves, Marina
A1 Gómez Mejía, Esther
A1 Rosales Conrado, Noelia
A1 León González, María Eugenia de
A1 Madrid Albarrán, María Yolanda
AB A solid-liquid extraction method using ethanol-water mixtures was combined with cLC-DAD, LC-MS/MS and chemometric analyses for establishing the optimum extraction conditions of valuable polyphenols from spent coffee grounds. Chlorogenic and p-coumaric acids were the most abundant polyphenols found, ranging from 0.02 to 4.8 mg g−1 and 0.173–0.50 mg g−1, respectively. In addition, total polyphenol content (9–29 mg GAE g−1 DW), total flavonoid content (11–27 mg QE g−1 DW), total antioxidant activity (0.3–7 mg GAE g−1 DW) and free radical scavenging ability (DPPH assay, 64–927 µg extract g−1 at EC50) of obtained extracts were determined. Response surface methodology allowed obtaining predictive models for the extraction of each individual polyphenol. On the other hand, multifactorial ANOVA was used to establish differences between coffee and spent coffee ground extracts. Principal component analysis was also employed to relate antioxidant activities, total polyphenol and total flavonoid contents with both the polyphenols extracted and the residue coffee type. The overall results suggested that spent coffee grounds could be reused as a promising, inexpensive and natural source of bioactive polyphenols with potential industrial applications, thus minimizing the waste disposal and environmental impact.
PB Elsevier Science Ltd
SN 0956-053X
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/92824
UL https://hdl.handle.net/20.500.14352/92824
LA eng
NO Ramón-Gonçalves, M., Gómez-Mejía, E., Rosales-Conrado, N., León-González, M.E., Madrid, Y., Extraction, identification and quantification of polyphenols from spent coffee grounds by chromatographic methods and chemometric analyses, Waste Management 96 (2019) 15-24, doi: https://doi.org/10.1016/j.wasman.2019.07.009.
NO Comunidad de Madrid
NO Ministerio de Economía y Competitividad (España)
NO Universidad Complutense de Madrid
NO European Commission
DS Docta Complutense
RD 18 abr 2025