2004•Nanjing Zhongyiyao Daxue xuebaoRequires access

Effect of Different Extraction Methods on Ephedrine Extraction Yield

Di Liu

Abstract

OBJECTIVE To compare between different methods of extraction of Herba Ephedrae. METHOD With ephedrine hydrochloridum as the chemical index, five methods of extraction of Herba Ephedrae (semi-bionics, decoction, warm-soaking, acid alcohol reflux extraction, distillation) were compared. RESULT The optimal extraction methods for ephedrine were in the following order: semi-bionics, decoction, acid alcohol reflux extraction, warm soaking and distillation. CONCLUSION Semi-bionics is the optimal method of extraction.

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Key concepts: Decoction, Extraction (chemistry), Ephedrine, Bionics, Chromatography, Alcohol, Chemistry, Yield (engineering)