大孔吸附树脂法富集白薇中总皂苷的工艺研究

目的：建立白薇总皂苷的测定方法，研究利用大孔树脂富集、纯化白薇总皂苷的工艺条件及参数。方法：选择蔓生白薇苷A为对照品建立白薇总皂苷的测定方法；以白薇总皂苷的洗脱率和精制度为指标，研究大孔吸附树脂富集、纯化白薇总皂苷的吸附性能，优化洗脱参数。结果：采用香草醛-高氯酸体系显色后测定白薇总皂苷，检测波长为518 nm；大孔吸附树脂HP-20的静态吸附容量为59.3 mg·g^-1；白薇70%乙醇提取物以水和30%乙醇洗脱，用90%乙醇富集，所得白薇总皂苷含量达77.62%。结论：本方法可方便有效地纯化富集白薇中皂苷类化合物。

Enrichment of saponins in Radix et Rhizoma Cynanchi Atrati withmacroporous resin

Objective: To develop an approach to the determination of saponins in Radix Cynanchi Atrati, and to optimize the parameters for purified the preparation of total saponins by macroporous resin column chromatography. Method: Using cynanversicoside A as a reference, the determination of saponins was performed; according to the elution rate and the purity of the products, the preparation performance of total saponins by macroporous resin was investigated, and its parameters were optimized. Result: The saponins in Radix Cynanchi Atrati were successfully determined at 518 nm by vanillin-perchloric acid as spray reagent. The macroporous resin HP-20 showed static absorption ratio of 59.3 mg·g^-1; the 70% ethanol extraction of Radix Cynanchi Atrati was eluted from column of macroporous resin HP-20 by water and 30% ethanol, and the saponins were concentrated in 90% ethanol solution. The content of saponin part eluted from HP-20 column was 77.62%. Conclusion: The proposed approach allows convenient and efficient preparation and puritifciation of saponin in Radix Cynanchi Atrati.