虎杖中白藜芦醇的吸附特性和稳定性研究

[目的]研究用大孔树脂吸附分离虎杖中白藜芦醇的特性及其稳定性。[方法]分析大孔树脂对白藜芦醇的吸附曲线,分析流速、乙醇体积分数、提取时间、提取温度、pH等因素对大孔树脂吸附白藜芦醇的影响。[结果]AB-8树脂对虎杖中白藜芦醇的吸附更接近单分子层吸附。以1.5 m L/min流速通过层析柱时吸附率更高,用70%乙醇提取虎杖中白藜芦醇时提取率最高,3 h是最佳提取时间;60℃是最佳提取温度;p H为4时白藜芦醇提取率最高。稳定性研究表明,白藜芦醇在酸性条件下保存浓度基本不变。[结论]用大孔树脂吸附分离白藜芦醇具有一定的优势。

Research on the Adsorption Characteristics and Stability of Resveratrol from Polygonum cuspidatum

[Objective]The research aimed to study the adsorption characteristics and stability of resveratrol from Polygonum cuspidatum by macroporous resin adsorption.[Method] The adsorption curve of resveratrol was analyzed by macroporous resin.The effects of flow rate,ethanol volumn fraction,extraction time,extraction temperature and pH on the adsorption of resveratrol by macroporous resin were analyzed.[Result] The adsorption of AB-8 resin for resveratrol was more close to the monolayer adsorption.When the flow rate was 1.5 mL/min,the adsorption rate was higher;extraction rate of resveratrol from Polygonum cuspidatum with 70％ ethanol was the highest;3 h was the optimum extraction time;60 ℃ was the optimum extraction temperature;when the pH was 4,extraction rate of resveratrol was highest.Stability research showed that resveratrol concentration kept unchanged under acidic conditions.[Conclution] Adsorption and separation of resveratrol by macroporous resin has some advantages.