Degradation kinetics of some phenolic compounds in subcritical water and radical scavenging activity of their degradation products
Abstract
The degradation of 10 phenolic compounds including 9 phenolic acids (caffeic, chlorogenic, p ‐coumaric, gallic, gentisic, p ‐hydroxybenzoic, protocatechuic, syringic and vanillic acids) and one flavanol (catechin) in subcritical water at the initial concentration of 100 mg/L was investigated in a temperature range of 100–250°C for 30–120 min in a batch‐type vessel. The degradation process followed the first‐order kinetics model. After treatment at 250°C for 30 min, all the compounds completely disappeared. We also demonstrated that the subcritical water treatment of some phenolic compounds, especially, caffeic acid, resulted in products that were quite stable at high temperature and exhibited a high DPPH radical scavenging activity, that is retaining about 50% of the DPPH radical scavenging activity compared to the original caffeic acid solution after the treatment at 250°C for 120 min.
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Gallic acid, caffeic acid, and catechin are phenolic compounds with relatively high antioxidant properties.
“Gallic and caffeic acids, as well as catechin, are phenolic compounds with relatively high antioxidant properties [29] found in many fruits and vegetables.”
From Phenolic Compounds, Antioxidant Activity, and Medium Chain Fatty Acids Profiles of Coconut Water and Meat at Different Maturity Stages (2016) · cites this paper as [29]
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- Authors
- Khuwijitjaru, P., Plernjit, J., Suaylam, B., Samuhaseneetoo, S., Pongsawatmanit, R., & Adachi, S.
- Affiliations
- Silpakorn University (TH)
- Kasetsart University (TH)
- Kyoto University (JP)
- Corresponding author
- Khuwijitjaru, Pramote
- Venue
- The Canadian Journal of Chemical Engineering
- Publisher
- Wiley
- Published
- 2013-08-16
- Volume
- 92
- Issue
- 5
- Pages
- 810-815
- ISSN
- 0008-4034 (ISSN-L)
- 1939-019X
- OpenAlex
- W1994216798
- Cited by
- 76
- References
- 19
- Citations by year
- 2026: 10 · 2025: 3 · 2024: 5 · 2023: 5 · 2022: 6 · 2021: 7 · 2020: 7 · 2019: 6 · 2018: 8 · 2017: 7 · 2016: 7 · 2015: 4 · 2014: 1
- FWCI
- 2.21
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Canadian Journal of Chemical Engineering (publishedVersion)
- Funders
- Thailand Research Fund
- Office of the Higher Education Commission
- Research and Development Institute, Silpakorn University
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Subcritical and Supercritical Water Processes
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
- Keywords
- phenolic compounds, subcritical water, degradation kinetics, first-order kinetics, phenolic acids, caffeic acid, catechins, flavan-3-ols, DPPH radical scavenging, degradation products, high-temperature treatment
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