竹笋壳黄酮类化合物的提取及其抗氧化活性的研究

以竹笋壳为原料,采用乙醇浸提法来提取黄酮类化合物。结果表明,竹笋壳黄酮最佳的提取工艺参数:乙醇浓度为60%,浸提时间为3 h,料液比为1∶25,浸提温度为80℃,此时提取量可达到4.393 mg/g。考察了竹笋壳黄酮类化合物提取液对羟基自由基的清除能力。结果表明,当竹笋壳黄酮类提取物的浓度达到60μg/mL时,其对.OH的清除率达到58.02%,表现出良好的抗氧化活性。

Study on the extraction and antioxidant activity of flavonoid compounds from shells of bamboo shoots

The flavonoids were extracted from shells of bamboo shoots with ethanol solution.The optimum extraction conditions were:ethanol concentration 60%,solid-liquid ratio 1∶ 25,extraction time 3 h,temperature 80 ℃.As the result,the yield of flavonoids reached 1.797 6 mg/g.Results still showed that the flavonoids had high antioxidant activity,which benefited to take full advantage of the bamboo shoots shells.