Abstract
The stable 90Zr isotope causes isobaric interferences with 90Sr determination during inorganic mass spectrometry applications. To avoid interference of 90Zr, chemical separation of Zr from Sr is carried out using extraction chromatography resins. In this study, Zr decontamination factors were determined with Eichrom DGA and Sr resins. The Zr decontamination factor of Sr resin (~ 104) was one magnitude higher than DGA’s (~ 103). The recovery of Sr was around 90% in both resins. In a combination of two separation steps either using DGA-Sr resin or Sr–Sr resin, a Zr decontamination level of 107–108 could be achieved.
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