Methods The extraction process was investigated by solvent extraction and ethanol precipitation, with extractive yield and chlorogenic acid as the indexes.
方法以绿原酸含量和提取物得率为考察指标，通过对水提和水提醇沉两种方法进行比较。
The best extraction method and process of flavonoids from water chestnut were studied by used ethanol extraction, ultrasonic extraction and microwave extraction.
研究了乙醇浸提法、超声波法和微波法提取荸荠总黄酮的最佳工艺。
Process for the extraction of flavones from Ginkgo leaves with ethanol-water was studied, and content of flavones was determined by spectrophotometry.
研究了乙醇-水体系浸取银杏叶中黄酮类化合物的工艺条件，通过分光光度法测定黄酮的含量并计算它的浸出率。
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