微波法提取红洋葱总黄酮的研究

Research on the flavonoid extracting technology by microwave from red onion

通过微波加热回流乙醇的方法,从红洋葱中提取总黄酮,并在单因素基础上设计正交试验.结果表明,时间2×2 min,乙醇浓度80%,料液比2∶30,提取率达6.099%.

The experiment of extraction of the flavonoid from red onion by microwave radiation method was investigated. Based on the single factor experiments,the effects of solid-liquid ratio,alcohol concentration and extraction time on the extraction yield of the flavonoid from red onion were optimized with orthogonal design.The result showed that optimum extraction parameters were as follows： extraction time 4 min,solid-liquid ratio was 2 ∶ 30 and the alcohol concentration was 80%. Under the optimum conditions,the yield was 6. 099%.