马蓝药材中水分、灰分及浸出物的测定
Determination of Moisture, Ash and Extract in Strobilanthes cusia

目的：测定马蓝中水分、总灰分、酸不溶性灰分、浸出物的含量，为马蓝药材质量标准的建立提供参考依据。方法：依据《中国药典》2020年版四部通则下方法，分别对24个不同批次的马蓝药材中水分、总灰分、酸不溶灰分和浸出物进行测定。结果：24个批次的马蓝水分含量范围在7.68%~9.37%，总灰分含量范围在7.32%~9.94%，酸不溶性灰分范围在0.51%~1.01%，浸出物范围在14.46%~26.76%。结论：建议马蓝药材的水分暂定不超过12%，总灰分不超过10%，酸不溶性灰分不超过3%，浸出物不少于10%。
Objective: To determine the contents of moisture, ash and extract in S. cusia, and to provide reference for the establishment of quality standard of S. cusia. Methods: The moisture, total ash, acid-insoluble ash and extract of 24 different batches of S. cusia were determined according to the method in the general principles of the 2020 edition of Chinese Pharmacopoeia. Results: The moisture content of 24 batches of S. cusia ranged from 7.68 % to 9.37 %, the total ash content ranged from 7.32 % to 9.94 %, the acid insoluble ash content ranged from 0.51 % to 1.01 %, and the extract ranged from 14.46 % to 26.76 %. Conclusion: It is recommended that the moisture content of the medicinal material should not exceed 12 %, the total ash content should not exceed 10 %, the acid insoluble ash content should not exceed 3 %, and the extract should not be less than 10 %.