title: [Determination of morphine in opium preparations. I. Studies on the assay of diluted opium powder and opium ipecac powder].
mesh_terms: D000431:Ethanol; D007486:Ipecac / Q000032:analysis*; D007564:Japan; D008722:Methods; D009020:Morphine / Q000032:analysis* / Q000302:isolation & purification; D009892:Opium / Q000032:analysis*; D010602:Pharmacopoeias as Topic; D011208:Powders
chemical_list: D011208:Powders; D000431:Ethanol; D009020:Morphine; D009892:Opium; D007486:Ipecac