[Objective] To set up an optimal method for the determination of total saponins from RADIX BUPLEURI extracts. [Method] The determination method was optimized by single factor test according to the absorbance of total saponin. [Result] The best determination method of total saponin was; 0. 2 ml test solution was added with 0. 1 ml 0.4% p-dimethylaminobenzaldehyde ethanol solution under 70 ℃ thermostat-ic waterbath for 10 minutes, after cooling off, 4 ml phosphoric acid was added under 50℃ thermostatic waterbath for 20 minutes. [ Conclusion] The method is table and practical, and it is applicable to the determination of total saponin from RADXI BUPLEURI extracts.%[目的]考察柴胡提取物中总皂苷的最佳测定方法.[方法]以总皂苷吸光度为评价指标,采用单因素试验优选柴胡总皂苷的测定方法.[结果]总皂苷的最佳测定方法为:供试品溶液0.2 ml,加入0.4％对二甲氨基苯甲醛乙醇溶液0.1 ml在70 ℃反应10 min,放冷后至室温后,加入4ml磷酸在50℃下反应20 min.[结论]该方法稳定可行,适用于柴胡总皂苷的含量测定.
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