Carrageenan Properties Extracted From Eucheuma cottonii, Indonesia

Distantina, Sperisa and Wiratni, and Fahrurrozi, Moh. and Rochmadi, (2011) Carrageenan Properties Extracted From Eucheuma cottonii, Indonesia. World Academy of Science, Engineering and Technology (54).

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    The effect of extraction solvent upon properties of carrageenan from Eucheuma cottonii was studied. The distilled water and KOH solution (concentration 0.1- 0.5N) were used as the solvent. Extraction process was carried out in water bath equipped by stirrer with constant speed of 275 rpm with a constant ratio of seaweed weight to solvent volume ( 1:50 g/mL) at 86o C for 45 minutes. The extract was then precipitated in 3 volume of 90% ethanol, oven dried at 60o C. Based on experimental data, alkali significantly influenced yield and properties of extracted carrageenan. The extracted carrageenan was found to have essentially identical FTIR spectra to the reference samples of kappa-carrageenan. Increasing the KOH concentration led to carrageenan containing less sulfate content and intrinsic viscosity. The gel strength increased along with the increasing of KOH concentration. The decreasing of intrinsic viscosity value indicates that a polymer degradation occurs during alkali extraction. Keywords— gel strength, sulfate, intrinsic viscosity, Eucheuma cottonii

    Item Type: Article
    Subjects: Q Science > QD Chemistry
    Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia
    Depositing User: mr azis r
    Date Deposited: 23 May 2013 22:28
    Last Modified: 23 May 2013 22:28

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