Physicochemical Characteristics of Sodium Alginate Extracted from Turbinaria sp. and Sargassum sp.

Rinta Kusumawati, Jamal Basmal, Bagus Sediadi Bandol Utomo


Characterization of sodium alginate extracted from two species of brown seaweeds (Turbinaria sp. and Sargassum sp.) harvested from Binuangeun Beach, Banten, has been conducted. The aim of the study was to evaluate physico-chemical characteristics (moisture, whiteness, viscosity, and functional groups) of sodium alginates extracted from Turbinaria sp. and Sargassum sp. Extraction was conducted in acid solution with the following steps: washing, acid extraction, bleaching, alginic acid conversion, sodium alginate conversion, dehydration, and drying. Each extraction was conducted in duplicate using approximately 1 kg of the dry raw materials (Turbinaria sp. and Sargassum sp.). Results of the analysis showed that the yield of sodium alginate powder extracted from Sargassum sp. was 24.56+0.56% (w/w) with moisture content of 12.69+1.24%; whiteness degree of 43.80+1.71%; and viscosity of 143.43+3.25 cPs, while the yield of sodium alginate powder extracted from Turbinaria sp. was 22.69+2.12% (w/w) with moisture content of 14.77+2.55%; whiteness degree of 23.77+0.68%; and viscosity of 133.67­+4.04 cPs. Meanwhile, the commercial sodium alginate was identified to have moisture content of 16.07+0.09%, whiteness degree of 29.37+0.55% and viscosity of 102.67+4.04 cPs. This indicates that physicochemical characteristics of sodium alginate extracted from Sargassum sp. is better than those extracted from Turbinaria sp. and commercial alginate since it had lower moisture content as well as higher whiteness degree and viscosity.


acid extraction, sodium alginate, Sargassum sp., Turbinaria sp.

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Daemi, H. & Barikani, M. (2012). Synthesis and characterization of calcium alginate nanoparticles, sodium homopolymannuronate salt and its calcium nanoparticles. Scientia Iranica, 19, 2023-2028.

Davis, T. A., Ramirez, M., Mucci, A.,& Larsen, B. (2004). Extraction, isolation, and cadmium binding of alginate from Sargassum spp. Journal of Applied Phycology, 16, 275-284.

Filippov, M. P. & Kohn, R. (1974). Determination of Composition of Alginates by Infrared Spectrscopy Method. Access on May 8th, 2017.

Husni, A., Subaryono, Pranoto, Y., Tazwir, dan Ustadi. Pengembangan metode ekstraksi alginat dari rumput laut Sargassum sp. sebagai bahan pengental. Agritech, 32(1).

Kusumawati, R. (2011). Penyediaan sumber daya hayati kelautan sebagai bahan baku bioenergi dalam perspektif ekosistem. Master. Thesis. InstitutTeknologi Bandung, Indonesia.

Murdinah, et. al. (2006). Pemanfaatan rumput laut. Laporan Teknis. Pusat Riset Pengolahan Produk dan Bioteknologi Kelautan dan Perikanan. Jakarta.

Pereira, L, Gheda, S. F., & Ribeiro-Claro, J. A. (2013). Analysis by vibrational spectroscopy of seaweed polysaccharides with potential use in food, pharmaceutical, and cosmetic industries. International Journal of Carbohydrate Chemstry, 2013. Access on September 9th, 2015.


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