After extracting solutions from the two methods, a large number of secondary liquid extracts (E) and solid residues (R) are produced.<br>The part (solid residue R) is treated with a vacuum dryer, and the liquid extraction part (E) is treated with a vacuum dryer.<br>The moisture content of sugar extracted from rotary evaporator is low, so the content of sugar is determined by Karl Fisher method. When the content of sugar is known, the quality of the sample can be accurately obtained, and then the types of sugar can be further analyzed by HPLC.
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