title: A sensitive high performance liquid chromatographic assay of a new metabolite of ampicillin in man.
abstract: A sensitive, high-performance liquid chromatographic method has been developed for the determination of piperazine-2,5-dione, a new metabolite of ampicillin, in human urine. Piperazine-2,5-dione was separated from human urine on a C18-column using phosphate buffer-methanol (pH 3.5) as eluent. Subsequently, the effluent underwent a postcolumn reaction with mercurous chloride and was then detected at 305 nm. It was found that piperazine-2,5-dione was also excreted in the urine of a volunteer dosed with ampicillin.
authors.forename: J
authors.initials: J
authors.lastname: Haginaka
authors.forename: J
authors.initials: J
authors.lastname: Wakai
mesh_terms: D000667:Ampicillin / Q000378:metabolism / Q000652:urine*; D002851:Chromatography, High Pressure Liquid; D054659:Diketopiperazines; D006801:Humans; D007700:Kinetics; D010879:Piperazines / Q000652:urine*
chemical_list: D054659:Diketopiperazines; D010879:Piperazines; C010939:2,5-dioxopiperazine; D000667:Ampicillin