Tags

Type your tag names separated by a space and hit enter

Supercritical fluid extraction from spent coffee grounds and coffee husks: antioxidant activity and effect of operational variables on extract composition.
Talanta. 2012 Jan 15; 88:544-52.T

Abstract

The present study describes the chemical composition and the antioxidant activity of spent coffee grounds and coffee husks extracts, obtained by supercritical fluid extraction (SFE) with CO(2) and with CO(2) and co-solvent. In order to evaluate the high pressure method in terms of process yield, extract composition and antioxidant activity, low pressure methods, such as ultrasound (UE) and soxhlet (SOX) with different organic solvents, were also applied to obtain the extracts. The conditions for the SFE were: temperatures of 313.15K, 323.15K and 333.15K and pressures from 100 bar to 300 bar. The SFE kinetics and the mathematical modeling of the overall extraction curves (OEC) were also investigated. The extracts obtained by LPE (low pressure extraction) with ethanol showed the best results for the global extraction yield (X(0)) when compared to SFE results. The best extraction yield was 15±2% for spent coffee grounds with ethanol and 3.1±04% for coffee husks. The antioxidant potential was evaluated by DPPH method, ABTS method and Folin-Ciocalteau method. The best antioxidant activity was showed by coffee husk extracts obtained by LPE. The quantification and the identification of the extracts were accomplished using HPLC analysis. The main compounds identified were caffeine and chlorogenic acid for the supercritical extracts from coffee husks.

Links

Publisher Full Text

Authors+Show Affiliations

Andrade KS
Chemical and Food Engineering Department, Federal University of Santa Catarina, EQA/UFSC-C.P. 476, CEP 88040-900, Florianópolis, SC, Brazil.
Gonçalvez RT
No affiliation info available
Maraschin M
No affiliation info available
Ribeiro-do-Valle RM
No affiliation info available
Martínez J
No affiliation info available
Ferreira SR
No affiliation info available

MeSH

AntioxidantsBenzothiazolesBiphenyl CompoundsCaffeineCarbon DioxideChlorogenic AcidChromatography, High Pressure LiquidChromatography, Supercritical FluidCoffeaCoffeeEthanolPicratesPlant ExtractsPressureSeedsSolventsSulfonic AcidsTemperatureWaste Products

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22265539

Citation

Andrade, Kátia S., et al. "Supercritical Fluid Extraction From Spent Coffee Grounds and Coffee Husks: Antioxidant Activity and Effect of Operational Variables On Extract Composition." Talanta, vol. 88, 2012, pp. 544-52.
Andrade KS, Gonçalvez RT, Maraschin M, et al. Supercritical fluid extraction from spent coffee grounds and coffee husks: antioxidant activity and effect of operational variables on extract composition. Talanta. 2012;88:544-52.
Andrade, K. S., Gonçalvez, R. T., Maraschin, M., Ribeiro-do-Valle, R. M., Martínez, J., & Ferreira, S. R. (2012). Supercritical fluid extraction from spent coffee grounds and coffee husks: antioxidant activity and effect of operational variables on extract composition. Talanta, 88, 544-52. https://doi.org/10.1016/j.talanta.2011.11.031
Andrade KS, et al. Supercritical Fluid Extraction From Spent Coffee Grounds and Coffee Husks: Antioxidant Activity and Effect of Operational Variables On Extract Composition. Talanta. 2012 Jan 15;88:544-52. PubMed PMID: 22265539.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Supercritical fluid extraction from spent coffee grounds and coffee husks: antioxidant activity and effect of operational variables on extract composition. AU - Andrade,Kátia S, AU - Gonçalvez,Ricardo T, AU - Maraschin,Marcelo, AU - Ribeiro-do-Valle,Rosa Maria, AU - Martínez,Julian, AU - Ferreira,Sandra R S, Y1 - 2011/11/17/ PY - 2011/07/08/received PY - 2011/11/10/revised PY - 2011/11/10/accepted PY - 2012/1/24/entrez PY - 2012/1/24/pubmed PY - 2012/6/5/medline SP - 544 EP - 52 JF - Talanta JO - Talanta VL - 88 N2 - The present study describes the chemical composition and the antioxidant activity of spent coffee grounds and coffee husks extracts, obtained by supercritical fluid extraction (SFE) with CO(2) and with CO(2) and co-solvent. In order to evaluate the high pressure method in terms of process yield, extract composition and antioxidant activity, low pressure methods, such as ultrasound (UE) and soxhlet (SOX) with different organic solvents, were also applied to obtain the extracts. The conditions for the SFE were: temperatures of 313.15K, 323.15K and 333.15K and pressures from 100 bar to 300 bar. The SFE kinetics and the mathematical modeling of the overall extraction curves (OEC) were also investigated. The extracts obtained by LPE (low pressure extraction) with ethanol showed the best results for the global extraction yield (X(0)) when compared to SFE results. The best extraction yield was 15±2% for spent coffee grounds with ethanol and 3.1±04% for coffee husks. The antioxidant potential was evaluated by DPPH method, ABTS method and Folin-Ciocalteau method. The best antioxidant activity was showed by coffee husk extracts obtained by LPE. The quantification and the identification of the extracts were accomplished using HPLC analysis. The main compounds identified were caffeine and chlorogenic acid for the supercritical extracts from coffee husks. SN - 1873-3573 UR - https://www.unboundmedicine.com/medline/citation/22265539/Supercritical_fluid_extraction_from_spent_coffee_grounds_and_coffee_husks:_antioxidant_activity_and_effect_of_operational_variables_on_extract_composition_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0039-9140(11)01013-7 DB - PRIME DP - Unbound Medicine ER -