Objective:To establish the optimal extraction technology of Xiaoer Yinqiao granules by orthogonal test. Methods:The effects of water amount,extraction duration and extraction times were investigated by orthogonal design using the contents of forsythia-side A and chlorogenic acid as the indices. Results: The optimum extraction process was as follows: adding 8-fold amount of water, and extracting 1. 5 h for the first time, and then adding 6-fold amount of water, extracting 1 h for the second and third time, respective-ly. Conclusion:The extraction technology is simple, reasonable and reliable.
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