title: High-performance liquid chromatographic assay of morphine and the main degradation product pseudo-morphine. A study of pH, discoloration and degradation in 1 to 43 year old morphine injections.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D006863:Hydrogen-Ion Concentration; D007267:Injections; D009020:Morphine / Q000032:analysis*
chemical_list: D009020:Morphine