陈品 顾欣 陈珍瑶 阎怡平 廖芸 张华



摘要 以甘孜川贝母为研究对象,考察单因素(流速、洗脱液体积、上样体积)和正交试验中AB-8 型大孔吸附树脂对纯化甘孜川贝母多糖损失率的影响,采用硫酸蒽酮法测定多糖含量。结果表明,流速、洗脱液体积、上样体积对甘孜川贝母多糖提取率均有影响,影响效果的因素从大到小依次为流速、上样体积、洗脱液体积。甘孜川贝母多糖纯化损失率最低的最优条件为流速1 mL/min、上样体积4 BV、洗脱液体积为4 BV。可见该优化条件下,甘孜川贝母多糖纯化损失率降低,提取率明显提高。
关键词 甘孜川贝母多糖;大孔吸附树脂;纯化;损失率
中图分类号 R284 文献标识码 A
文章编号 0517-6611(2020)14-0173-03
doi:10.3969/j.issn.0517-6611.2020.14.048
Abstract Ganzi Fritillaria was the research object.The single factors (flow rate,elution volume and sample volume) and the orthogonal experiment of polysaccharide purified by the AB-8 macroporous absorption resin were researched.The polysaccharide content was determined by anthrone-sulfate method.The results showed that flow rate,eluent volume and sample volume all had an effect on the extraction rate of Ganzi Fritillaria polysaccharides.The influencing order from high to low was the flow rate,sample volume and elution volume.The optimal purification condition with the lowest loss ratio of polysaccharide was 1 mL/min flow rate,4 BV elution volume and 4 BVsample volume.Therefore,under this optimal purification condition,the purification loss ratio of Ganzi Fritillaria is reduced,and the extraction rate is significantly improved.
Key words Ganzi Fritillaria polysaccharide;Macroporous absorption resin;Purification;Loss ratio
貝母为百合科(Liliaceae)贝母属 (Fritillaria) 植物的干燥鳞茎,具有止咳化痰、清热润肺之功效[1]。多糖是贝母中的有效活性成分之一,研究表明多糖具有多种生物活性,而且因其在使用过程中没有任何毒副作用,所以多糖已经成为绿色食品添加剂、功能保健品及新药研发等新的研究对象[2-3]。大孔吸附树脂由于受到自身的范德华力或氢键的作用,从而产生吸附性,是一种不含交换基团的大孔结构的高分子吸附剂[4],其对多糖的纯化具有显著的效果。但是大孔吸附树脂对多糖的提取纯化方法多种多样,对多糖的提取率也存在差异,导致对多糖的提取率不能得到保证。张华等[5]在贝母粗多糖的4种类型树脂纯化试验中,显示贝母多糖提取率较低。为此该试验以甘孜川贝母……