[Analysis of mixed pharmaceutical preparations. 18. Spectrophotometric determination of dl-methylephedrine hydrochloride in anti-cold pharmaceutical preparations with 2,4-dinitrophenylhydrazine].
D000996:Antitussive Agents / Q000032:analysis*; D003124:Colorimetry; D004339:Drug Compounding; D004809:Ephedrine / Q000032:analysis*; D006834:Hydrazines; D007202:Indicators and Reagents; D013053:Spectrophotometry
D000996:Antitussive Agents; D006834:Hydrazines; D007202:Indicators and Reagents; D004809:Ephedrine