title: Sensitive spectrophotometric method for determining methadone in biological specimens.
mesh_terms: D000818:Animals; D001464:Barium; D001646:Bile / Q000032:analysis; D008297:Male; D008433:Mathematics; D008691:Methadone / Q000032:analysis* / Q000378:metabolism / Q000652:urine; D008961:Models, Structural; D010084:Oxidation-Reduction; D010545:Peroxides; D011485:Protein Binding; D051381:Rats; D013053:Spectrophotometry; D014466:Ultraviolet Rays
chemical_list: D010545:Peroxides; D001464:Barium; D008691:Methadone