LI Xiao-ming, CHEN Min, SHAO Ai-juan, et al. Determination of Gypsum in Qingyan Liuwei San[J]. Chinese journal of experimental traditional medical formulae, 2011, 17(9): 72-73.
LI Xiao-ming, CHEN Min, SHAO Ai-juan, et al. Determination of Gypsum in Qingyan Liuwei San[J]. Chinese journal of experimental traditional medical formulae, 2011, 17(9): 72-73.DOI:
Objective: To establish the analysis method for determination of gypsum in Qingyan Liuwei San. Method: Samples were charcoaled and incinerated to ash
and the content of gypsum was determined by complexometric titration. Result: Calcium sulphate dihydrate in Qingyan Liuwei San was 17.63% and 21.60% with the average recovery of 102.88%
RSD of 0.65%. Conclusion: The method established was simple in operation
and can be used for the content determination of calcium sulphate dihydrate in Qingyan Liuwei San.