半枝莲中总生物碱的提取和纯化条件研究

目的确定最佳的提取、纯化条件,为半枝莲中总生物碱的开发和利用提供科学的理论依据。方法采用L9（34）正交试验,超声提取,考察酸浓度、料液比、温度、提取次数4个因素对半枝莲中总生物碱得率的影响。然后结合静态和动态吸附实验,分别比较了6种不同型号的大孔树脂对半枝莲总生物碱的吸附和解吸性能,并以比吸附量、比洗脱量为考察指标,对大孔树脂纯化总生物碱的条件进行了筛选。以盐酸小檗碱为对照品,甲醇-盐酸（100∶1）溶解,采用紫外分光光度法测定半枝莲总生物碱的含量。结果半枝莲中总生物碱的最佳提取工艺条件为12倍量1%的硫酸水超声提取3次,每次1 h,温度为70℃。通过对6种不同型号的大孔树脂的比较,表明HPD100型树脂具有最佳的吸附及洗脱参数,其最佳纯化条件为：上样液总生物碱质量浓度为1.015 7 mg·mL-1,pH在3.0~4.0之间,先以3.7倍柱体积的水洗去杂质,再以3.5倍柱体积45%乙醇洗脱,得总生物碱量是纯化前总生物碱量60%左右。结论该提取、纯化条件简单、可行,具有良好的应用前景。

Study on Extraction and Purification of the Total Alkaloids from Scutellaria Barbata D.Don

OBJECTIVE To provide a theoretical basis for development and ulitization of the total alkaloids of Scutellaria barbata D.Don by optimizing the best extraction and purification process.METHODS The concentration of extracting solvent,ratio of solid-to-liquid,temperature,extraction times were investigated and the L9(34) orthogonal test was adopted to optimize the process.By the static and dynamic adsorption experiments,six types of macroporous adsorption resins(D101,HPD100,HPD400,HPD500,HPD600,AB-8) were evalu...