The effect of ethanol concentration,ratio between solvent and material,as well as extraction time on the yield of dandelion root concrete was analyzed by single factor experiments.Then the response surface methodology is used for optimization analysis,the best extraction was 75%,ratio between solvent and material was 5.5,the extraction time was 4.3 hours.Under such extraction conditions,the average dandelion root concrete was 19.41%.The result matched the predicted value using Design Expert.
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