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Extraction and content determination of total saponins from Astragali Radix and Ophiopogonis Radix in Tingli Shengmai Decoction |
LI Jiajia1 ZHENG Wenli2 ZHANG Huatan3 LI Chunhua4 |
1.Grduate School, Hebei University of Chinese Medicine, Hebei Province, Shijiazhuang 050090, China;
2.Department of Pharmacy, Shijiazhuang Second Hospital, Hebei Province, Shijiazhuang 050051, China;
3.Shijiazhuang Keren Pharmaceutical Technology Co., Ltd, Hebei Province, Shijiazhuang 050035, China;
4.College of Pharmacy, Hebei University of Chinese Medicine, Hebei Province, Shijiazhuang 050200, China |
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Abstract Objective To study the content determination method of total saponins from Astragali Radix and Ophiopogonis Radix in Tingli Shengmai Decoction, and to optimize the optimum extraction process of Astragali Radix and Ophiopogonis Radix taking the contents as indices. Methods The vanillic aldehyde-glacial acetic acid-perchloric acid was selected as color developing agent, and the contents of total saponins were detected by ultraviolet spectrophotometry. By using orthogonal experiment, taking the contents of total saponins as indices, the effects of ethanol concentration, solid-liquid ratio and extraction duration for the extraction process were investigated, so as to optimize the optimum extraction process of Astragali Radix and Ophiopogonis Radix. Results In this study, astragaloside Ⅳ showed a good linear relationship within the range of 8.88-44.40 μg, all the RSD values of degree of precision, stability and repeatability experiments were ≤1.19%, the average recovery rate was 101.78%, RSD was 1.85% (n = 9). The optimum extraction process: reflux extraction of 8 times amount of 80% ethanol was taken for 2 times, once 2 h. Conclusion The method is simple, accurate and reproducible, which can be used as a method for the quality control of Astragali Radix and Ophiopogonis Radix in Tingli Shengmai Decoction
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