title: A simple method for purification of sodium penicillin from penicillenic acid contaminant.
mesh_terms: D004340:Drug Contamination; D006863:Hydrogen-Ion Concentration; D000432:Methanol; D008722:Methods; D010397:Penicillanic Acid; D010406:Penicillins / Q000302:isolation & purification*; D012822:Silicon Dioxide; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010406:Penicillins; D012822:Silicon Dioxide; D010397:Penicillanic Acid; D000432:Methanol