Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol
The current study aimed at developing an effective organosolv treatment, with the objective to obtain potato peel extracts highly enriched in polyphenols. To this end, two low-cost solvents were employed, 1- and 2-propanol, which are considered green, but they have been rather poorly studied compare...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/2076-3417/13/16/9484 |
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| author | Selma Casasni Akram Guenaoui Spyros Grigorakis Dimitris P. Makris |
| author_facet | Selma Casasni Akram Guenaoui Spyros Grigorakis Dimitris P. Makris |
| author_sort | Selma Casasni |
| collection | DOAJ |
| description | The current study aimed at developing an effective organosolv treatment, with the objective to obtain potato peel extracts highly enriched in polyphenols. To this end, two low-cost solvents were employed, 1- and 2-propanol, which are considered green, but they have been rather poorly studied compared to other conventional solvents, such as ethanol. Treatment development also embraced the use of sulfuric acid, a well-examined catalyst in organosolv processes. Treatment evaluation on the basis of response surface optimization and severity demonstrated that 1-propanol was a more effective solvent, providing a maximum yield in total polyphenols of 19.28 mg chlorogenic acid equivalents per g of dry potato peel weight, attained with 40% 1-propanol/1.5% (<i>w</i>/<i>v</i>) sulfuric acid at a treatment time of 60 min and a temperature of 90 °C. This treatment was of lower severity compared to the one with 2-propanol, and it also provided almost 24% higher total polyphenol yield. The extracts produced contained chlorogenic acid as the major constituent, accompanied by caffeic acid and minor amounts of <i>p</i>-coumaric acid. This is the first report on such an organosolv treatment of potato peels to recover polyphenolic compounds with high efficiency. |
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| format | Article |
| id | doaj.art-06954f686b154b868641e1ae38080555 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T00:08:05Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-06954f686b154b868641e1ae380805552023-11-19T00:10:30ZengMDPI AGApplied Sciences2076-34172023-08-011316948410.3390/app13169484Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-PropanolSelma Casasni0Akram Guenaoui1Spyros Grigorakis2Dimitris P. Makris3Department of Food Quality & Chemistry of Natural Products, Mediterranean Agronomic Institute of Chania (M. A. I. Ch.), International Centre for Advanced Mediterranean Agronomic Studies (CIHEAM), P.O. Box 85, 73100 Chania, GreeceDepartment of Food Quality & Chemistry of Natural Products, Mediterranean Agronomic Institute of Chania (M. A. I. Ch.), International Centre for Advanced Mediterranean Agronomic Studies (CIHEAM), P.O. Box 85, 73100 Chania, GreeceDepartment of Food Quality & Chemistry of Natural Products, Mediterranean Agronomic Institute of Chania (M. A. I. Ch.), International Centre for Advanced Mediterranean Agronomic Studies (CIHEAM), P.O. Box 85, 73100 Chania, GreeceGreen Processes & Biorefinery Group, Department of Food Science & Nutrition, School of Agricultural Sciences, University of Thessaly, N. Temponera Street, 43100 Karditsa, GreeceThe current study aimed at developing an effective organosolv treatment, with the objective to obtain potato peel extracts highly enriched in polyphenols. To this end, two low-cost solvents were employed, 1- and 2-propanol, which are considered green, but they have been rather poorly studied compared to other conventional solvents, such as ethanol. Treatment development also embraced the use of sulfuric acid, a well-examined catalyst in organosolv processes. Treatment evaluation on the basis of response surface optimization and severity demonstrated that 1-propanol was a more effective solvent, providing a maximum yield in total polyphenols of 19.28 mg chlorogenic acid equivalents per g of dry potato peel weight, attained with 40% 1-propanol/1.5% (<i>w</i>/<i>v</i>) sulfuric acid at a treatment time of 60 min and a temperature of 90 °C. This treatment was of lower severity compared to the one with 2-propanol, and it also provided almost 24% higher total polyphenol yield. The extracts produced contained chlorogenic acid as the major constituent, accompanied by caffeic acid and minor amounts of <i>p</i>-coumaric acid. This is the first report on such an organosolv treatment of potato peels to recover polyphenolic compounds with high efficiency.https://www.mdpi.com/2076-3417/13/16/9484antioxidantspotato peelsorganosolvpolyphenolsfood waste valorization |
| spellingShingle | Selma Casasni Akram Guenaoui Spyros Grigorakis Dimitris P. Makris Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol Applied Sciences antioxidants potato peels organosolv polyphenols food waste valorization |
| title | Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol |
| title_full | Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol |
| title_fullStr | Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol |
| title_full_unstemmed | Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol |
| title_short | Acid-Catalyzed Organosolv Treatment of Potato Peels to Boost Release of Polyphenolic Compounds Using 1- and 2-Propanol |
| title_sort | acid catalyzed organosolv treatment of potato peels to boost release of polyphenolic compounds using 1 and 2 propanol |
| topic | antioxidants potato peels organosolv polyphenols food waste valorization |
| url | https://www.mdpi.com/2076-3417/13/16/9484 |
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