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报道了用酸性染料比色法测定小青龙胶囊中有效成分盐酸麻黄碱的含量，制剂中其它成分不干扰，平均回收率为（９９．８±１．８６）％，相对标准差为１．８６％．
The content of ephedrine hydrochloride in Xiaolonglong capsule was determined by acid dye colorimetry. The average recovery was (99.8 ± 1.86)% with the relative standard deviation of 1.86 %.