J4 ›› 2011, Vol. 10 ›› Issue (12): 32-34.
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Objective: To determine the moisture, ashes, and extracts from the Coptidis rhizome for establishing the quality
standards. Methods: According to the procedures recorded in the Appendix IX H, IX K and X A of 2010 Chinese Pharmacopoeia,moisture, ashes, and extracts of samples were measured respectively. Results: The moisture of Coptidis was less than 14.00%; the total ashes was less than 5.00 %, with the acid insoluble ash content was less than（1.78±0.04）%; with hot soak method, the content of water extract was higher than（24.42±0.25）%, the content of ethanol extract was not less than 15.00%, the content of ether extract was higher than（3.39±0.08）%. Conclusion: The methods discribed above are simple, accurate and replicatable. They are suitable for moisture, ashes and extracts measurement.
