Advertisement

Radiochemical sensor system for the analysis of 99Tc(VII) in groundwater

  • O.  Egorov
  • M. J. O’Hara
  • J. W. Grate
  • M. Knopf
  • G. Anderson
  • J. Hartman
Article

Summary

Direct determination of 99Tc in groundwater using a sensor device represents a substantial challenge due to the short range of beta-particles, the presence of radiological interferences, and low-level detection requirements. This paper describes a radiochemical sensing method for selective detection of 99Tc(VII) in water. The sensing approach uses a dual-function composite sensor microcolumn that incorporates both selective sorption and scintillating properties. Analyte detection is carried out in a reagentless equilibration sensing regime using chemically unmodified groundwater. The sensor method was implemented in a prototypical probe device that integrates the sensor element, scintillation detection, data acquisition, and instrument control components in a single functional instrument compatible with a 3.5" well casing geometry. The feasibility of rapid 99Tc analysis in Hanford groundwater (Hanford Site, USA) below regulatory drinking water level of 33 Bq/l was demonstrated.

Keywords

Groundwater Sample Sensor Cell Sensor Probe Pacific Northwest National Laboratory Detector Trace 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag/Akadémiai Kiadó 2005

Authors and Affiliations

  • O.  Egorov
    • 1
  • M. J. O’Hara
    • 1
  • J. W. Grate
    • 1
  • M. Knopf
    • 1
  • G. Anderson
    • 1
  • J. Hartman
    • 1
  1. 1.Pacific Northwest National Laboratory

Personalised recommendations