Extraction and fractionation of phenolic acids and glycoalkaloids from potato peels using acidified water/ethanol-based solvents
Abstract
Potato processing generates potato peels as byproducts. Methanolic extracts from the peels result in mixtures of phenolic acids and glycoalkaloids. Phenolic acids have potential for food applications owing to their antioxidant and antibacterial properties. However, when extracted from potatoes, their separation from toxic glycoalkaloids is needed prior to their applications in foods. Moreover, glycoalkaloids may be used as feedstock for synthesis of pharmaceuticals. This study aimed to develop a method for the extraction and fractionation of phenolic acids and glycoalkaloids from potato peels using food grade water/ethanol-based solvents. Samples were analyzed by ultrafast liquid chromatography (UFLC) and/or ultrafast liquid chromatography–mass spectrometry (UFLC–MS). A methanol-based solvent for extraction was used as a control to be compared with two aqueous ethanolic solvents acidified with acetic acid. The recovery of the predominant compounds from potato peels was comparable for all three solvents. Extraction yielded per 100g of potato peel fresh weight 17.0mg α-chaconine, 7.1mg α-solanine, 0.1mg solanidine, 4.8mg caffeic acid, 13.3mg neochlorogenic acid, and 77.6mg chlorogenic acid. More than 90% of these compounds were recovered after two consecutive extractions. The crude extract was fractionated by solid-phase extraction at pH7 and eluted with aqueous ethanol. Quantitative recovery of the phenolic acids and glycoalkaloids was achieved in their corresponding fractions. Hydrolysis followed by solid-phase fractionation of the crude extract allowed recovery of 139μmol caffeic acid/100g potato peel fresh weight. Partial degradation of caffeic acid and glycoalkaloids occurred during the process. Degradation of caffeic acid can be likely mitigated by the addition of antioxidants and metal chelators. The method developed in this study allows the sustainable recovery of secondary plant metabolites from potato peels and their fractionation using food grade water/ethanolic solvents for application of phenolic extracts free of toxic glycoalkaloids for food preservation, and of glycoalkaloid extracts for synthesis of pharmaceuticals.
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Potato waste biorefineries for production of bioactive compounds were profitable by limiting number of plants to 28 within Europe and with bioactive compound price fixed at EUR 300/kg.
“Potato waste biorefineries for the production of bioactive compounds were profitable by limiting the number of plants to 28 within Europe and with the bioactive compound price fixed at EUR 300/kg based on biorefinery data obtained from Maldonado et al. [142].”
From Food Waste Biorefinery: Pathway towards Circular Bioeconomy (2021) · cites this paper as [142]
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“Potatoes are a staple crop globally since it is the world’s fourth-largest food crop [9].”
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The Efficacy of Phenolic Compound Extraction from Potato Peel Waste
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“A few new methods such as ultrasonic and microwave assisted extractions [36,37], pressurized liquid-based removal [38] and acidified solvents-based extraction [39] have been documented to isolate the valuable compounds from PPW.”
MethodEffect of Potato Glycoside Alkaloids on Energy Metabolism of Fusarium solani
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“Many studies have investigated and compared acidic pretreatment with other advanced techniques and have revealed considerable effect on PPW degradation 21,51,55 .”
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Effect of Different Solvents on the Extraction of Phytochemicals in Colored Potatoes
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“Following the methods of [20], potatoes were cleaned, then cut in one-inch cubes.”
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Features and genetic basis of chlorogenic acid formation in diploid potatoes
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Scaling up of food waste valorization market outlooks: key concerns
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Medicinal Properties of Fruit and Vegetable Peels
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“The PP is a good source of pharmacologically important phenolic compounds, flavonoids, glycoalkaloids, and dietary fiber (Sánchez Maldonado et al. 2014).”
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Phytochemical profile, biological activities, and biotic stress factors of Solanum tuberosum
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Potato peels as feedstock for laccase-catalysed synthesis of phellinsin A
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Potato Processing Waste as a Reservoir of Bioactive Hydroxycinnamates: A Critical Review
Makris, D. P. (2024) · Biomass · doi:10.3390/biomass5010002 · Cited by 5 · see citing works
“Thus, uncontrolled alkali treatment of PPs would inevitably lead to significant HCA losses [53,62].”
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Utilisation of Potato Peel in Fabricated Potato Snack
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Biovalorization of Potato Peel Waste: An Overview
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“It was revealed that potato peels contain various polyphenols and phenolic acids, which are responsible for its antioxidant activities, as well as fatty acids and lipids, which exhibit interesting antibacterial activities [26, 27].”
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“A common approach for GA extraction is the methanol–water method (Maldonado et al. 2014), which often includes solid-phase extraction (SPE) and column purification steps.”
Potato Peels as Source of Nutraceutics
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Potato Waste-Based Packaging Edibles: A Sustainable Approach for Food Preservation
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Step Forward on Waste Biorefineries: Technology Bottlenecks and Perspective on Commercialization
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Sources and extraction methods of phenolic acids
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Improvement of functional properties of Chlorella -inulin conjugates via Maillard reaction
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ISOLATION OF STEROIDAL GLYCOALKALOIDS FROM POTATO PEEL BY ACID EXTRACTION
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“Существует водно-спиртовой способ экстракции из картофельной кожуры [21].”
A Monte Carlo Enhanced PSO Algorithm for Optimization Design of Heliostat Field
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Recovering Bioactive Compounds from Starch Wastes
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Resource Recovery from the Abundant Agri‐biomass
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“Chlorogenic acid isomers can be hydrolyzed to quinic and caffeic acids (Sánchez Maldonado et al., 2014).”
BackgroundQUE TAN FACTIBLE ES PRODUCIR SOLANINA COMO BIOPESTICIDA
Cristancho, Y. (2018) · Infometric@ - Serie Ingeniería, Básicas y Agrícolas
- Authors
- Sánchez Maldonado, A. F., Mudge, E., Gänzle, M. G., & Schieber, A.
- Affiliations
- University of Alberta (CA)
- University of Bonn (DE)
- Corresponding author
- Schieber, Andreas
- Venue
- Food Research International
- Publisher
- Elsevier BV
- Published
- 2014-11
- Volume
- 65
- Pages
- 27-34
- ISSN
- 0963-9969 (ISSN-L)
- OpenAlex
- W2079491702
- Cited by
- 110
- References
- 52
- Citations by year
- 2026: 5 · 2025: 3 · 2024: 12 · 2023: 15 · 2022: 10 · 2021: 15 · 2020: 19 · 2019: 9 · 2018: 6 · 2017: 8 · 2016: 5 · 2015: 1 · 2014: 1 · 2013: 1
- FWCI
- 7.16
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Food Research International (publishedVersion)
- Funders
- Agriculture Funding Consortium
- Canada Research Chairs
- Alberta Innovates
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Potato Plant Research
- Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
- Life Sciences › Agricultural and Biological Sciences › Food Science › Agricultural and Biological Research
- Keywords
- potato peel, phenolic acids, glycoalkaloids, α-chaconine, α-solanine, caffeic acid, chlorogenic acid, neochlorogenic acid, solid-phase extraction, solvent fractionation, food-grade solvents, acetic acid, hydrolysis, plant secondary metabolites, food by-product valorization, food preservation
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