The Effect of Temperature and Solvent Concentration on Chemical and Physical Properties of Carrageenan from Gracilaria gracilis

Authors

  • Emi Erawati Universitas Muhammadiyah Surakarta
  • Rois Fatoni Department of Chemical Engineering, Faculty of Engineering, Universitas Muhammadiyah Surakarta
  • Hamid Hamid Department of Chemical Engineering, Faculty of Engineering, Universitas Muhammadiyah Surakarta
  • Tri Noviasari Department of Chemical Engineering, Faculty of Engineering, Universitas Muhammadiyah Surakarta

DOI:

https://doi.org/10.21776/

Keywords:

Gracilaria sp, carrageenan, extract, concentration, and temperature.

Abstract

Carrageenan is a polysaccharide extracted from seaweed sap using either air or an alkaline solution, such as Gracilaria gracilis. It functions as a thickening, emulsifying, suspending, and stabilizing agent. This paper reports the effect of KOH concentrations and temperatures on the extraction, in addition to determining the physical and chemical properties of the seaweed. A dried G. gracilis was soaked in distilled water for 24 hours and heated at 85°C for two hours. It was found the fat content was 3.56%, protein content 17.68%, moisture content 1.984%, and ash content of 26.547%. The highest values for water holding capacity (WHC) were 4.07 g/g, oil holding capacity (OHC) 3.539 g/g, swelling capacity (SC) at 1.894 mL/g, solubility index (SI) at 10.843 g/100g, emulsifying activity (EA) at 73.483%, and pH at 7.520.

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Author Biography

  • Emi Erawati, Universitas Muhammadiyah Surakarta
    Department of Chemical Engineering

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Published

2025-03-12

Issue

Vol. 14 No. 1 (2025): Edition January-April 2025

Section

Articles

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How to Cite

The Effect of Temperature and Solvent Concentration on Chemical and Physical Properties of Carrageenan from Gracilaria gracilis. (2025). The Journal of Pure and Applied Chemistry Research, 14(1), 59-72. https://doi.org/10.21776/