中文摘要：

目的优化土大黄蒽醌的提取工艺。方法采用正交实验法，以土大黄中总蒽醌的含量为考察指标，对土大黄的最佳提取条件进行研究。结果土大黄加水回流提取3次，每次加水15倍量，每次30min，总蒽醌成分可充分提取。结论该方法操作简便、快速，可用于土大黄蒽醌的提取。

英文摘要：

Objective To optimize the extraction technology of anthraquinones from the root of Radix Rumicis Obtusifolii. Methods The extraction study was carried out through orthogonal experiment regarding content of anthraquinones as an index . Results The total anthraquinones were thoroughly obtained by 30 min of circumfluence reflux with 15 times volume of water for 3 cycles. Conclusion The method is easy, quick and can be used for extracting the total anthraquinones from the root of Radix Rumicis Obtusifolii.