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  • Title: [Study on the preparation and quality standard of Ephedra sinica dispensing granules].
    Author: Zhou B, Gao WY, Zhang TJ, Zhang JX.
    Journal: Zhong Yao Cai; 2006 Nov; 29(11):1236-8. PubMed ID: 17228668.
    Abstract:
    OBJECTIVE: To optimize the preparation process and to set up the quality standard of Ephedra sinica Dispensing Granules. METHODS: Nine experiments were carried out by L9 (3(4)) orthogonal design. Ephedra sinica Dispensing Granules was identified by TLC and the content of ephedrine was determined by HPLC. RESULTS: The optimal extraction process was as follows: the water that 10 times of Ephedra sinica, was decocted 3 times and each time was sustained for 1.5 hours. The linear relationship of ephedrine hydrochloride was at the range of 0.0081 - 0.1377 microg (r = 0.999 9). The average recovery was 100.25% ( RSD = 2.24%, n = 6). CONCLUSION: The extraction process is scientific. The method is available with a good reproducibility and can control the quality of Ephedra sinica Dispensing Granules.
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