响应面法优化脚板薯皂苷提取工艺
2014-04-29刘媛洁等
刘媛洁等
摘要
[目的]优化脚板薯皂苷的最佳提取工艺。[方法]探讨提取温度、提取时间、料液比和乙醇浓度对脚板薯皂苷提取率的单因素影响。在此基础上,采用响应面分析方法,进一步研究各自变量及其交互作用对脚板薯皂苷提取率的影响,并对其工艺参数进行优化。[结果]脚板薯皂苷提取的最佳工艺条件为提取温度76 ℃、提取时间1.5 h、乙醇浓度90%、料液比1∶30(m/v),在此最优工艺条件下,脚板薯皂苷提取率达0.291%。[结论]该研究可为脚板薯皂苷的工业化生产提供理论指导。
关键词脚板薯;响应面分析;皂苷;提取
中图分类号S567文献标识码A文章编号0517-6611(2014)36-12885-03
Abstract[Objective] The Response Surface Methodology (RSM) was used to optimize the extraction process of total saponins from Dioscorea alata Lirm.sp. [Method] The impact of extraction temperature, extraction time, ethanol concentration and solidliquid ratio on the yield of diosgenin are investigated, based on which the response surface analysis is adopted to study the impact of each variable and their interaction on yield of diosgenin and optimize the extraction parameter. [Result] It is found that optimal parameters for diosgenin extraction form Dioscorea alata Lirm.sp were as follows: extraction temperature 76 ℃, extraction time 1.5 h , ethanol concentration 90%, solidliquid ratio 1∶30(m/v). [Conclusion] The research provides the theoretical guidance for the industrial production of diosgenin in Dioscorea alata Lirm.sp.
Key words Dioscorea alata Lirm.sp; Response Surface Analysis; Saponins; Extraction
脚板薯(Dioscorea alata Lirm.sp)属薯蓣属(Dioscorea),又称参薯,是一年生或多年生缠绕性藤本植物[1-2],其块状根茎发达,呈不规则扁块形状,型似脚板,故得名[3]。脚板薯块茎颜色呈黄褐色或深褐色,其含有淀粉、蛋白质、薯蓣皂苷、维生素、粘质多糖等多种成分[4],长期食用具健脾、养肺、固肾、益精的生理功效[5]。薯蓣皂苷是重要的医药原料,是合成多种甾体抗炎药、性激素、避孕类药物的前体[6-8]。笔者在此探讨提取温度、提取时间、料液比和乙醇浓度对脚板薯皂苷提取率的单因素影响,在此基础上,采用响应面分析方法,进一步研究各自变量及其交互作用对脚板薯皂苷提取率的影响,优化了脚板薯中皂苷的提取工艺,为脚板薯皂苷的工业化生产提供科學参考。
1 材料与方法
1.1 材料
1.1.1
供试材料。新鲜脚板薯,采自江西宜春万载,经真空干燥后粉碎备用。
1.1.2
主要试剂。石油醚、无水乙醇、甲醇为分析纯;……
