title: Potential errors in benzoylecgonine and cocaine analysis.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003042:Cocaine / Q000031:analogs & derivatives* / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration
chemical_list: C005618:benzoylecgonine; D003042:Cocaine