Objective:To study on several influencing factors of index content

tetrohydropalmatine

in Corydalis Rhizoma. The reference datas were provided for its quality control. Method: The contents of tetrohydropalmatine of corydalis yanhusuo in different origin

growth years

process methods and grain sizes were detemined

respectively. The datas were analyzed by statistical methods. Result: According to the determine datas of different samples of Corydalis Rhizoma

the content of tetrohydropalmatine was higer in Zhejiang Province than in Shanxi for producing area

one year than two year for growing time

moistened samples than soaked samples for softening methods and there were no significant differences between the different particle sizes of Corydalis Rhizoma. Conclusion: The influencing factors on the content of tetrohydropalmatine in Corydalis Rhizoma were producing area

growing years and softening methods except the particle sizes.