2011•Journal of Changshu Institute of TechnologyRequires access
Optimization of Extraction Technology of Polysaccharides from Green Tea Named Changshu Shajiabang
Yu Da
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Abstract
Water was used as extraction solvent.Crude green tea named Changshu Shajiabang was used as raw material.The effect of time,temperature,material-liquid ratio and extraction times on extraction recovery of polysaccharides from tea were investigated.Based on a single experiment,extraction technology of polysaccharides from tea was optimized by the analysis of orthogonal experiment.Characteristic absorbance of polysaccharides was verified by the analysis of infrared spectra.The optimum technology conditions for water extraction of polysaccharides from tea were determined as follows:the extraction temperature was 80℃,the extraction time was 3h,the material-liquid ratio was 1:30(g/ml).Under the optimum technology conditions,the extraction rate of polysaccharides was 2.95%.The result of analysis of infrared spectra showed that polysaccharides from tea had characteristic absorbance of polysaccharides.