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本文分析了止喘片中盐酸麻黄碱含量检验数据偏高的原因，通过改进氢氧化钠试液加入量的精确度，由空白试验校正，使偏高现象得以消除。
This paper analyzes the reasons for the high test data of Ephedrine Hydrochloride in Zhichuan tablets. By improving the precision of adding the amount of sodium hydroxide test solution, the blank test can correct the phenomenon that the high phenomenon can be eliminated.