Objective: To set up the quality standards of Dioscorea zingiberensis in Henan area preliminary. Method: On the basis of discrimination in Characters

microscopic and TLC

the content of water

total ash

acid insoluble ash and alcohol soluble extractive were determined According to the method in the Chinese Pharmacopoeia (edition 2010)

and the content of diosgenin and pseudoprodioscin was determined by HPLC. Result: The moisture in Dioscorea zingiberensis should be no more than 7%;the total ash should be within 8%;the acid-insoluble ash should not be higher than 2%;alcohol soluble extractive should not be lower than 16%. The content of diosgenin should not be lower than 1%

and the content of pseudoprodioscin should be higher than 0.4%. Conclusion: The study provide the reference basis for making and perfecting the quality standards system of D. zingiberensis.