Objective: To determine the condition of drying process for Radix Tripterygii Wilfordii extract. Methods: Under different dying temperature and time, both triptolide and triptophenolide extracted from extract of Radix Tripterygii Wilfordii were measured. Results: After Radix Tripterygii Wilfordi extract was dried for 48 hours at 80 ?C , loss of triptophenolide and triptolide was relatively low, but after dried more than 48 hours at 100 ?C , the content of triptophenolide and triptolide reduced by 15.0%～30.0%. Conclusion: Drying temperature for Radix Tripteryqii Wilfordii extract should be controlled under 80 ?C .

Objective Dissolution test was applied to study the dissolution rates of total flav ones from Pollen Typhae before and after wall breaking.Methods The content of total flavones was determined by UV -spectrophotometry an d Basket -Stirring Method.Results Using total flavones as the index,T 50 was 29.57min and T d was 41.28min before wall break-ing,and 41.27min and 54.26min respectively after wall breaking,the dif ference being very significant.Conclusion The dissolution rate of the total fla vones from Pollen Typhae is faster after wall -breaking treatment than th at before treat-ment.