Chinese herbal medicine polysaccharide composition has a variety of biological activity, is an immune enhancer. Wang Li and other microwave technology using water extraction method of extraction of Radix Isatidis polysaccharide, with phenol. Determination of polysaccharide content by sulfuric acid colorimetry. The extraction rate of Radix Isatidis increased from 0.81% to 3.47% and the time was shortened to 1/2. The content of polysaccharide was determined by phenol acid sulfuric acid colorimetry method, and the extraction rate was increased from 50.01% to 53.92% by microwave irradiation.
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