【摘要】 白藜芦醇的提取主要以有限资源虎杖为原料。作者开发了以新的原料葡萄穗轴废渣提取白藜芦醇的工艺。经薄层层析法对提取液分离后,用紫外分光光度法测定吸光度,确定了白藜芦醇的含量。考察了不同提取剂(甲醇、乙醇、丙酮、乙酸乙酯)、不同乙醇体积比、温度、时间、物料比对白藜芦醇提取率的影响。通过单因素实验和正交实验确定了最佳提取条件:体积分数50%的乙醇为提取剂,提取温度70℃,m(葡萄穗轴)∶m(乙醇)=1∶13,提取时间4.0 h,白藜芦醇一次提取率达0.34%。更多还原

【Abstract】 Resveratrol was extracted mainly from the limited resource Polygonum cuspidatum.The waste residue of grape spike-stalk was developed as a novel resource to extract resveratrol.The yield of resveratrol was determined by ultraviolet spectrometry after separation by using thin layer chromatography.The effects of different solvents(methanol,ethanol,acetone and ethyl acetate) and other factors on the extraction yield were studied.The optimum conditions were φ(ethanol)=50% ethanol solution as extractant,ratio of materials 1∶13,extraction temperature 70 ℃ and extraction time 4.0 h.The extraction yield of resveratrol could reach 0.34%.更多还原