This paper presents data that supports Accelerator Mass Spectrometry (AMS) as a valid bioanalytical tool for tracing long lived radioisotopes in uses as molecular labels or elemental tracers.

background : selenium-73 (t 1/2 =7.1h) and selenium-75 (t 1/2 =119.8d) are useful radioisotopes in many research fields. the wide ranges of applications of these radioisotopes arose great interest for their production. simultaneous production of 73 se and 75 se is more cost-effective and less time-consuming. materials and methods : 73 as (p, 3n) 73 se and 75 as (p,n) 75 se reactions were determ...