Effect of Extraction Methods on Characteristic of SodiumAlginate from Brown Seaweed Sargassum fluitans

Maharani, A. A. S. E.; Husni, Amir; Ekantari, Nurfitri

doi:10.17844/jphpi.v20i3.19768

Cited by 11 publications

(11 citation statements)

References 6 publications

(6 reference statements)

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“…Sodium alginate has three specific peaks: hydroxyl bonds in the absorption area of about 3500 cm -1 , COO-asymmetrical in the absorption area of about 1620 cm -1 , and COO-symmetrical in the absorption area of about 1410 cm -1 . At the same time, alginate fingerprints will be present at a wavelength of 950-750 cm -1 [3,8,14,15]. Therefore, the current FTIR analytical study shows that the alginate spectrum corresponded to a positive reference and fingerprint at a specific alginate wavenumber.…”

Section: Ftir Analysismentioning

confidence: 66%

Physicochemical properties of sodium alginate from brown algae Sargassum aquifolium and Sargassum cinereum

Chaldun¹,

Andayani²,

Handayani³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Synthesis and characterization of sodium alginate from Sargassum aquifolium dan Sargassum cinereum have been successfully performed. S. aquifolium and S. cinereum were collected from the Dompu Islands, West Nusa Tenggara, Indonesia. Extraction was performed by acid pathway, due to cell disruption and the addition of Na2CO3 for extraction. The addition of HCl was to convert acid alginate into alginate, then transformed acid alginate into sodium alginate using NaOH. NaOCl and IPA were used for purification. Physicochemical properties were characterized using SEM-EDS, FTIR, and TG/DTG. The morphological structure of synthetic sodium alginate shows layer structure and fiber fibrils. Sodium alginate contained C, O, Na, and Cl elements. FTIR spectrum indicated the presence of functional groups at the following wavelengths: OH at 3343 cm−1, CH2 at 2915 cm−1, CO double bonds at 1614 cm−1, and fingerprint indicated by the presence of uronic acid, which functioned as the CH group stretched at 935 cm−1. The sodium alginate sample shows a three-step thermal degradation pattern. The first step was starting at 41.7 °C associated with dehydration and was followed by 206.4 and 241 °C associated with decomposition. TGA/DTG results showed a reduction in thermal stability at 250–300 °C. It is suitable for modification and application.

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Section: Ftir Analysismentioning

confidence: 66%

Physicochemical properties of sodium alginate from brown algae Sargassum aquifolium and Sargassum cinereum

Chaldun¹,

Andayani²,

Handayani³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…38 The peaks at 1614 and 1414 cm −1 prove the presence of the O−C−O asymmetric stretching vibration and O−C−O symmetric stretching vibration, which are the characteristic peaks of SA. 39 The CS peaks appear at 3449 (O−H and N−H stretch), 2922 (C−H stretch), 1614 (−NH 2 bend), 1422 (CH 2 bend), 1383 (CH 3 symmetrical deformation), 1327 (C− N stretch), and 1059 cm −1 (C−O stretch). 40 The peak around 1614 cm −1 proves the presence of bending vibrations of the amine group (−NH 2 ), which is the characteristic peak of CS.…”

Section: Sem Imagesmentioning

confidence: 99%

Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test

Kusjuriansah,

Rodhiyah,

Syifa

et al. 2024

ACS Omega

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Citrus hystrix leaves have been used traditionally as a spice, a traditional medicine for respiratory and digestive disorders, and a remedy for bacterial infections. This study reports on the synthesis of composite hydrogels using the freeze−thaw method with poly(vinyl alcohol) (PVA) as the building block loaded by C. hystrix leaf extract (CHLE). Additionally, chitosan (CS) and sodium alginate (SA) were also loaded, respectively, to increase the antibacterial activity and to control the extract release of the composite hydrogels. The combinations of the compositions were PVA, PVA/CHLE, PVA/CHLE/CS, PVA/CHLE/SA, and PVA/ CHLE/SA/CS. The internal morphology of the hydrogels shows some changes after the PVA/CHLE hydrogel was loaded by CS, SA, and SA/CS. The analysis of the Fourier transform infrared (FTIR) spectra confirmed the presence of PVA, CHLE, CS, and SA in the composite hydrogels. From the X-ray diffraction (XRD) characterization, it was shown that the composite hydrogels maintained their semicrystalline properties with decreasing crystallinity degree after being loaded by CS, SA, and SA/CS, as also supported by differential scanning calorimetry (DSC) characterization. The compressive strength of the PVA/CHLE hydrogel decreases after the loading of CS, SA, and SA/CS, so that it becomes more elastic. Despite being loaded in the composite hydrogels, the CHLE retained its antibacterial activity, as evidenced in the in vitro antibacterial test. The loading of CS succeeded in increasing the antibacterial activity of the composite hydrogels, while the loading of SA resulted in the decrease of the antibacterial activity. The release of extract from the composite hydrogels was successfully slowed down after the loading of CS, SA, and SA/CS, resulting in a controlled release following the pseudo-Fickian diffusion. The cytotoxic activity test proved that all hydrogel samples can be used safely on normal cells up to concentrations above 1000 μg/mL.

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“…There could still be many impurities in the alginate solution, which would raise the ash content of the extracted alginate [32]. [45] reported that factors affecting the ash content of alginate included habitat and water conditions, mineral content in seaweed, and post-harvest handling. [1] and [45] informed that the high ash content of the extracted alginate is probably due to the presence of NaCl salt residue that is not removed when washing the alginic acid precipitate so that it does not dissolve when it is deposited using isopropyl alcohol.…”

Section: Ash Contentmentioning

confidence: 99%

Physical and Chemical Characteristics of Alginate Extracted from Sargassum sp

Irianto

Giyatmi

Fransiska³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Scientists have proved alginate which is extracted from brown seaweed, to be able to reduce blood glucose levels in mice. These results indicate that alginate has health benefits. Sargassum sp. is a brown seaweed growing wildly in Indonesian waters and is considered a prospective source of alginate to be developed and used for various purposes. This study aimed to explore the potency of alginate production using Sargassum sp. as raw material, particularly to reveal the physical and chemical properties of alginate obtained. Alginate was extracted using a method developed by Ref. [1]. During the extraction process, alginate yield was determined. The alginate was analyzed for physical parameters (whiteness degree and viscosity) and chemical parameters (moisture content, acid insoluble ash content, ash content, fat content, and protein content). Results showed that the yield of alginate was 20.30%. The whiteness degree and viscosity values of alginate were -31.53 and 47.25 cPs, respectively. At the same time, the moisture content, insoluble acid content, ash content, fat content, and protein content of alginate were 11.76%, 2.28%, 27.55%, 0.18%, and 0.76%, correspondingly. The alginate was classified as low viscosity and suitable for processing various foods, including functional food, by taking the health benefits of alginate.

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Effect of Extraction Methods on Characteristic of SodiumAlginate from Brown Seaweed Sargassum fluitans

Cited by 11 publications

References 6 publications

Physicochemical properties of sodium alginate from brown algae Sargassum aquifolium and Sargassum cinereum

Physicochemical properties of sodium alginate from brown algae Sargassum aquifolium and Sargassum cinereum

Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test

Physical and Chemical Characteristics of Alginate Extracted from Sargassum sp

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