Abstract
A method has been developed for the determination of trimethylselenonium (TMSe) ion and selenite (SeO/sub 3//sup 2 -/) ion in urine by anion exchange chromatography, selectively eluting TMSe and SeO/sub 3//sup 2 -/. Since the recoveries are quantitative, a method of additive spikes is employed to determine TMSe and SeO/sub 3//sup 2 -/ ion concentrations in urine specimens. The TMSe and SeO/sub 3//sup 2 -/ chromatographic elutions were collected in vials, irradiated with neutrons, and radioassayed for /sup 77m/Se activity. The limit of detection is 10 ng of Se as TMSe or SeO/sub 3//sup 2 -//ml of urine. Thirteen urine specimens from normal subjects were analyzed for TMSe, SeO/sub 3//sup 2 -/, and total selenium concentration.
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