title: A simple, new method for testing impurities in cephalexin.
mesh_terms: D002411:Cation Exchange Resins; D002506:Cephalexin / Q000032:analysis*; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D004340:Drug Contamination; D008722:Methods; D009555:Ninhydrin
chemical_list: D002411:Cation Exchange Resins; D009555:Ninhydrin; D002506:Cephalexin