title: A method for determination of subpicomole concentrations of tetrahydropapaveroline in rat brain by high-performance liquid chromatography with electrochemical detection.
abstract: A sensitive and selective method for detection of tetrahydropapaveroline (THP) in rat brain has been developed. The procedure employs a multiple-stage separation scheme that selectively isolates THP from rat brain tissue and utilizes the sensitivity and resolution of reversed-phase high-performance liquid chromatography with electrochemical detection to provide an analysis with high specificity for THP. The mean (+/- SD) recovery of THP from rat brain homogenates, fortified at levels ranging from 0.25 to 3.0 pmol per whole brain, was 43.4 +/- 3.5%. The concentration of THP in brains of rats pretreated with L-dopa was 0.44 +/- 0.14 (SD) pmol per gram. The limit of detection of THP was approximately 0.1 pmol (0.03 ng) per gram brain.
mesh_terms: D000327:Adsorption; D000818:Animals; D001923:Brain Chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004563:Electrochemistry; D008297:Male; D008832:Microchemistry; D010208:Papaverine / Q000031:analogs & derivatives*; D051381:Rats; D011919:Rats, Inbred Strains; D013765:Tetrahydropapaveroline / Q000032:analysis*
chemical_list: D013765:Tetrahydropapaveroline; D010208:Papaverine