Antioxidant activity and phenolic content of pressurised liquid and solid–liquid extracts from four Irish origin macroalgae
Abstract
Summary The efficiency of solid–liquid extraction ( SLE ) and pressurised liquid extraction ( PLE ) for the recovery of antioxidant and polyphenols from the I rish macroalgae, F ucus serratus , L aminaria digitata , G racilaria gracilis and C odium fragile, was assessed using the 2,2‐diphenyl‐1‐picrylhydrazyl ( DPPH ) and ferric reducing antioxidant power ( FRAP ) assays and the F olin– C iocalteu total phenol content ( TPC ) assay. F ucus serratus had TPC and antioxidant activities thirty times higher than the other species. Solid–liquid extraction cold water ( CW SLE ) had the highest TPC (81.17 μg GAE mg −1 sample) derived from F . serratus , compared with the TPC of 61.12 μg GAE mg −1 sample for the corresponding PLE extract. For both SLE and PLE extracts, low TPC levels were observed in L . digitata , G . gracilis and C . fragile . The majority of SLE extracts possessed higher FRAP and DPPH activities compared with their PLE counterparts. This study indicates that the high temperatures and pressures in PLE did not enhance the antioxidant activities relative to conventional SLE extraction.
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Heffernan et al. and Ummat et al. determined TACs of 0.002 and 72.600 mg GAE/g d.w. for 80% (v/v) and 50% (v/v) ethanolic extracts of seaweed from Ireland, respectively.
“Heffernan et al. [26] and Ummat et al. [27] determined the TACs of 0.002 mg GAE/g d.w. and 72.600 mg GAE/g d.w. for the 80% (v/v) and 50% (v/v) ethanolic extracts of seaweed (Ireland), respectively.”
From Improvement of Alginate Extraction from Brown Seaweed (Laminaria digitata L.) and Valorization of Its Remaining Ethanolic Fraction (2024) · cites this paper as Heffernan et al. [26]
During SWE, thermolabile compounds can be degraded because of high temperatures.
“During SWE, some compounds, such as thermolabile compounds, can be degraded because of the high temperatures that are applied [64].”
From Overview on the Application of Modern Methods for the Extraction of Bioactive Compounds from Marine Macroalgae (2018) · cites this paper as [64]
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- Authors
- Heffernan, N., Smyth, T. J., FitzGerald, R. J., Soler‐Vila, A., & Brunton, N.
- Affiliations
- Teagasc - The Irish Agriculture and Food Development Authority (IE)
- University of Limerick (IE)
- Ollscoil na Gaillimhe – University of Galway (IE)
- University College Dublin (IE)
- Corresponding author
- Smyth, Thomas J.
- Venue
- International Journal of Food Science & Technology
- Publisher
- Oxford University Press (OUP)
- Published
- 2014-03-03
- Volume
- 49
- Issue
- 7
- Pages
- 1765-1772
- ISSN
- 0950-5423 (ISSN-L)
- 1365-2621
- OpenAlex
- W1988698148
- Cited by
- 93
- References
- 43
- Citations by year
- 2026: 6 · 2025: 8 · 2024: 13 · 2023: 3 · 2022: 12 · 2021: 15 · 2020: 6 · 2019: 7 · 2018: 6 · 2017: 9 · 2016: 4 · 2015: 2 · 2014: 1 · 2013: 1
- FWCI
- 8.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Food Science & Technology (publishedVersion)
- Funders
- Marine Institute (MFFRI/07/01)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
- Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
- Life Sciences › Agricultural and Biological Sciences › Food Science › Agricultural and Biological Research
- Keywords
- seaweed, antioxidant activity, polyphenols, total phenolic content, accelerated solvent extraction, solid-liquid extraction, Fucus serratus, Laminaria digitata, Gracilaria gracilis, Codium fragile, seaweed extract
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