title: Improved method for the simultaneous determination of morphine, codeine and dihydrocodeine in blood by high-performance liquid chromatography with electrochemical detection.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D003061:Codeine / Q000031:analogs & derivatives* / Q000097:blood*; D004563:Electrochemistry; D005966:Glucuronidase; D006801:Humans; D006868:Hydrolysis; D007202:Indicators and Reagents; D009020:Morphine / Q000097:blood*; D009566:Nitrates
chemical_list: D007202:Indicators and Reagents; D009566:Nitrates; D009020:Morphine; D005966:Glucuronidase; C014481:dihydrocodeine; C006568:ammonium nitrate; D003061:Codeine