Determination of technetium-99 in aqueous samples by isotope dilution inductively coupled plasma-mass spectrometry

Abstract

Prepared for lhc L.'. 5. Departrt, er_t.of Energy w,der contract No. DE.-.AC()9--89SR1803.5 _ASTER _._ DISTT_BU'_O_O_ rt.4fSD,OCUME!NT tSUNLIMI"I_£'D DISCLAIMER This report was prepared as an account of work sponsored by an agency of fl_eUnited States Government.

99Tc detection in water samples by ICP-MS

“…1 that the only differences between the methods A1 and A2 are the different chromatographic columns used to concentrate technetium and isolate the analyte from Ru and Mo. For Ru decontamination, the use of the TEVA·Spec resins (Eichrom Industries, Inc.) has been proposed [1]. The DF for Ru and Mo are high [21] and since the eluant volumes involved are very low, its use is clearly advantageous when compared to conventional exchange resins.…”

“…The DF for Ru and Mo are high [21] and since the eluant volumes involved are very low, its use is clearly advantageous when compared to conventional exchange resins. The conditions for loading, cleaning and the Tc elution for this microcolumn have been well described elsewhere [1,10,21], thus our efforts are to investigate the column performance when high volume solutions are loaded. Or, when the same microcolumn is reused multiple times using modest sample volumes.…”

“…99 Tc will probably be a significant contributor with respect future committed dose of radiation to the population. Furthermore, its high mobility makes its introduction into underground waters from nuclear waste disposal sites potentially troublesome [1].…”

Extension of Studies with 3M Empore TM and Selentec MAG *SEP SM Technologies for Improved Radionuclide Field Sampling

“…Both of these are commercially available. 3M prepared a membrane containing the EIChroM Industries, Inc. (Darien IL) TEVA resin, which has been well characterized for the extraction of technetium &om aqueous solution (Beals, 1996). These are called the TEVA disks in the following discussions.…”

“…At the SRS samples are then anal* by isotope dilutiodmductively coupled plasma-mass spectrometry @D/ICP-MS; Beals, 1996) to achieve the required detection limit of 1 pCiL (0.06 nanogram per liter). One nanogram (1.4 pCi) of Tc-97 is added to the aqueous sample as a tracer, the technetium is extracted fiom the aqueous sample by passing through an extraction chromatography column.…”