NDLI: Supercritical Carbon Dioxide Extraction of Phenolic Compounds from Potato (Solanum tuberosum) Peels

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Supercritical Carbon Dioxide Extraction of Phenolic Compounds from Potato (Solanum tuberosum) Peels

Content Provider	MDPI
Author	Lima, Micael De Andrade Andreou, Rafaela Charalampopoulos, Dimitris Chatzifragkou, Afroditi
Copyright Year	2021
Description	In the last three decades, greener technologies have been used, aiming at extracting phenolic compounds from vegetable matrices due to the inherent advantages compared to organic solvent-based methodologies. In this work, supercritical CO2 was investigated for recovering phenolic acids from potato peels. Following screening runs for assessing the significant extraction parameters, a Central Composite Design of Experiments was carried out aiming at process optimization, with methanol concentration (MeOH, %) and CO2 flow rate (qCO 2, g/min) as independent variables. Both parameters were deemed to impart a significant effect on the final response. Although the major phenolic acid in potato peels is chlorogenic acid (CGA), the main compound extracted was caffeic acid (CFA), present at a concentration of 0.75 mg/g dry peel in the extracts. The optimum extraction conditions were 80 °C, 350 bar, MeOH 20%, and flow rate of 18.0 g/min, which enabled a total phenolic recovery of 37% and a CFA recovery of 82%. The antioxidant activity of the supercritical fluid extraction (SFE) extracts was also measured, with the highest scavenging capacity reaching 73%. The need for using mixtures of water and organic solvents as co-solvents in SFE to enable CGA recovery seems necessary, possibly due to its better dissolution in aqueous solutions than in pure solvents.
Starting Page	3410
e-ISSN	20763417
DOI	10.3390/app11083410
Journal	Applied Sciences
Issue Number	8
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-04-10
Access Restriction	Open
Subject Keyword	Applied Sciences Paper and Wood Supercritical Carbon Dioxide Methanol Phenolics Extraction Chlorogenic Acid Optimization Potato Peels
Content Type	Text
Resource Type	Article

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