乙醇浓度对枇杷叶主要功能成分提取效果研究  

Study on Extraction Effect of Ethanol Concentration on Main Functional Components of Loquat Leaves

作　　者：徐久婷 韩晓婷 杨培华[1] 鲁周民[1] XU Jiu-ting;HAN Xiao-ting;YANG Pei-hua;LU Zhou-min*(College of Forestry,Northwest A&F University,Xianyang 712100,Shaanxi,China)

机构地区：[1]西北农林科技大学林学院,陕西咸阳712100

出　　处：《食品研究与开发》2020年第13期37-42,共6页Food Research and Development

基　　金：西北农林科技大学试验示范站科技推广重点项目(XTG2018-14)。

摘　　要：为研究不同乙醇浓度对枇杷叶主要功能成分提取效果的影响,为生产利用提供技术参考,以65℃热风烘干条件下干制的枇杷叶为原料,采用不同浓度乙醇溶液进行提取,测定其黄酮、总酚、多糖的含量及抗氧化性能的变化。结果表明,随着乙醇浓度的上升,枇杷叶主要功能成分含量及抗氧化性能呈先上升后下降的趋势。50%乙醇溶液提取总酚、多糖的效果较好,70%乙醇提取黄酮的效果较好。提取应用的成分有多糖与总酚时,使用的溶剂为50%乙醇提取效果最好,在以黄酮为主要成分的提取应用中,使用浓度为70%的乙醇溶剂有最好的效果。In order to study the effect of different ethanol concentrations on the extraction of the main functional components of loquat leaves and provide technical reference for production and utilization,loquat leaves dried under the condition of hot air drying at 65℃were used as raw materials to extract with ethanol solutions of different concentrations,and the changes of flavonoids,total phenols,polysaccharides and antioxidant properties were determined.The results showed that with the increase of ethanol concentration,the main functional components and antioxidant properties of loquat leaves increased first and then decreased.In general,50%and 70%ethanol had the best extraction effect,of which 50%ethanol had better extraction effect on total phenol and polysaccharide and 70%ethanol had better extraction effect on flavone.Therefore,in the production based on total phenol and polysaccharide,extraction with 50%ethanol as solvent could obtain better extraction effect.However,70%ethanol was the best extraction method for flavonoids.

关 键 词：枇杷叶 乙醇浓度 功能成分 抗氧化性 

分 类 号：R284.2[医药卫生—中药学]