Extraction and characterization of sodium alginate from Moroccan Laminaria digitata brown seaweed
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Sodium alginate from Moroccan Laminaria digitata brown seaweed were extracted under different conditions. The extraction yield was affected by the extraction temperature and the samples’ size. Alginates were purified by re-precipitation with ethanol and characterized by 1 H NMR, fluorescence spectroscopy and infrared spectroscopy, in order to determine their structural and physicochemical properties. Viscosimetric measurements gave an intrinsic viscosity of 2.542 dL/g which permits to calculate the average molar mass value (1.14 × 10 5 g/mol). By analyzing 1 H NMR spectra, Moroccan L. digitata alginates showed a high quantity of both homopolymeric mannoronic and guluronic blocks ( F MM = 0.47) and ( F GG = 0.41) respectively, while the alternating block fractions ( F MG = 0.06 and F GM = 0.06) showed low values than those previously described in the literature. The M / G ratio value is 1.12 allowing the preparation of alginates suitable to form soft and elastic gels more than brittle ones. The characteristics obtained for Moroccan Laminaria digitata may be useful to obtain polyelectrolyte complexes for the production of drug delivery micro- and nanoparticles. In some cases, a charged polysaccharide with low viscosity is needed.
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Fertah et al. obtained an M/G ratio of 1.12 for alginate isolated from Moroccan L. digitata via conventional extraction (acid treatment with 0.2 mol/L for 24 h).
“Fertah et al. [23] obtained the M/G ratio of 1.12 for alginate isolated from Moroccan L. digitata via the conventional extraction technique (acid treatment of biomass with 0.2 mol/L during 24 h).”
From Improvement of Alginate Extraction from Brown Seaweed (Laminaria digitata L.) and Valorization of Its Remaining Ethanolic Fraction (2024) · cites this paper as Fertah et al. [23]
The obtained M/G ratio agrees with data available in the literature, even though the seaweed species and extraction procedure are different.
“These results indicate that the obtained M/G ratio agrees with the data available in the literature, even though the seaweed species and extraction procedure are different from each other.”
From Improvement of Alginate Extraction from Brown Seaweed (Laminaria digitata L.) and Valorization of Its Remaining Ethanolic Fraction (2024) · cites this paper as Fertah et al. [23]
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Structures, Properties and Applications of Alginates
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Self-citation
- Authors
- Fertah, M., Belfkira, A., Dahmane, E. M., Taourirte, M., & Brouillette, F.
- Affiliations
- Cadi Ayyad University (MA)
- Université du Québec à Trois-Rivières (CA)
- Corresponding author
- Fertah, Mohamed
- Venue
- Arabian Journal of Chemistry
- Publisher
- Scientific Scholar
- Published
- 2017-05
- Volume
- 10
- Pages
- S3707-S3714
- ISSN
- 1878-5352 (ISSN-L)
- OpenAlex
- W2021044839
- Cited by
- 460
- References
- 1
- Citations by year
- 2026: 41 · 2025: 46 · 2024: 70 · 2023: 61 · 2022: 59 · 2021: 41 · 2020: 57 · 2019: 30 · 2018: 29 · 2017: 18 · 2016: 4 · 2015: 3 · 2013: 1
- FWCI
- 11.95
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Arabian Journal of Chemistry (publishedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Polysaccharides Composition and Applications
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Polysaccharides and Plant Cell Walls
- Keywords
- sodium alginate, Laminaria digitata, brown algae, alginate extraction, extraction temperature, intrinsic viscosity, molar mass, mannuronic/guluronic acid ratio, alginate hydrogel, polyelectrolyte complexes, drug delivery nanoparticles
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