Abstract
An improved isotope dilution mass spectrometric technique has been developed for the analysis of /sup 99/Tc in environmental samples. After spiking with /sup 97/Tc, technetium is isolated from the sample by sequential ion-exchange chromatography and ion-association solvent extraction. The isolated technetium is finally concentrated onto a pair of anion exchange beads (diameter approx. 0.3 mm). The beads are individually analyzed on rhenium V filaments of a surface-ionization mass spectrometer. Determination of as little as 1 pg (0.017 pCi) has been achieved through the enhanced ionization efficiency afforded by the resin bead source. /sup 99/Tc has been quantified in several environmental samples taken at the Savannah River Plant (SRP) site (a nuclear materials production complex) and its aqueous /sup 99/Tc emission has been estimated. 3 figures, 3 tables.
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