Inquiry of Water-Soluble Polysaccharide Extraction Conditions from Grapefruit Skin

Ziping Luo, Zilin Liu, Shiyu Tan, Qiliang Xu, Haiyan Yang, Lingli Yang

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DOI: 10.4236/eng.2011.311135                

Abstract

Water-soluble polysaccharide was isolated from grapefruit with the method of water-dissolving and ethanol-precipitating. By single factor test and orthogonal experimental method, the extraction conditions of the water-soluble polysaccharide were investigated, which contained liquid-solid ratio, temperature, time and pH. The results showed that pH was the most important factor of polysaccharide extraction, followed by temperature. The optimized extraction technology conditions were obtained. The liquid-solid ratio was 1:40, temperature was 90?C, time was 2.0 h, and pH was 2. The highest extraction rate of crude polysaccharide was 8.30%.

Keywords

Grapefruit, Water-Soluble Polysaccharide, Extracting Condition, Single Factor Experiment and Orthogonal Experiment

Conflicts of Interest

The authors declare no conflicts of interest.

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