不同体积分数的乙醇对蜂胶有效成分提取率的影响

Effect of Different Volume Fractions of Alcohol on the Rates of Propolis Active Component Extraction

采用不同体积分数的乙醇水溶液提取蜂胶有效成分．结果表明，蜂胶提取率随乙醇体积分数的提高而提高．当乙醇体积分数≥０．７时，蜂胶提取率随乙醇体积分数提高而提高的变化值极小，差异不显著；当乙醇体积分数≤０．７时，蜂胶提取率随乙醇体积分数的下降而下降。

Different volume fractions of alcohol water solutions were used for the extraction of the active components in propolis. As the volume fractions of alcohol increased, the rates of extraction increased. When the volume fractions were equal to and above 0.7, there were no significant increasing rates of propolis extraction, When the volume fractions were equal to and below 0.7, there were significant decreasing rates of propolis extraction as the volume fractions of alcohol decreased.