研究了从白花蛇舌草水提取物中选择性富集环烯醚萜苷类成分的方法.该方法采用硅胶基质的寡聚乙二醇(OEG,实验室自合成)和ODS两种填料依次作为固定相,对白花蛇舌草水提醇沉样品进行固相萃取,并以超高效液相色谱(UPLC)系统对在富集的各个阶段得到的产物进行了色谱表征.实验结果表明,采用该方法得到的终产物的产率为8.21% .从UPLC谱图中可以看出固相萃取环烯醚萜苷类成分选择性富集的过程.终产物中14种典型的环烯醚萜苷类化合物含量明显升高,可达白花蛇舌草水提物的6.1倍,回收率为50.1% ,富集效果明显.因此,将白花蛇舌草水提物醇沉后依次经过OEG柱与ODS柱的串联固相萃取可选择性地富集环烯醚萜苷类成分.该方法操作步骤较少,操作简便,选择性好,提取效率较高,富集效果明显.
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