Water-extraction process of active ingredients from Qi chrysanthemum by microwave method

To optimize microwave extraction technique of Qi chrysanthemum,the optimum extraction process is optimized with orthogonal test.Experiments are made by using L9(34) orthogonal design with extraction rate of total flavonoids and luteolin as indexes,water as solvent,investigating the influence of the ratio of solid to liquid,extracting time,extracting temperature and so on.In comparison with the water refluxing extraction technology.The results show that the optimum extraction conditions are both that the extraction time 3 min,liquid-solid ratio 1:25,extraction temperature 85 ℃,extracted twice.Under this condition,total flavonoids and luteolin extraction rates are 65.02% and 85.77%.The total flavonoids and luteolin's extraction rates of water refluxing method are 66.12% and 85.37%.Water-extraction by microwave method achieve the extraction rate of water refluxing method in less time and lower temperature,thus a new extraction technology for flavonoids in Qi chrysanthemum with high efficiency,economic and security was estabilshed.