Comparison of a radiation counting method and ICP-MS for the determination of99Tc in environmental samples

  • K. Tagami
  • S. Uchida
  • M. García-León
Non-Radiometric Methods for Determination of Long-lived Radionuclides


Results of99Tc measurements between radiation and non-radiation counting methods were compared using four radiation sources for which99Tc has been previously determined with a gas-flow proportional counter or a GM counter. Each99Tc source consisted of a stainless steel planchet bound by mylar films. Seaweeds collected from the Irish Sea were analyzed and99Tc was electroplated on the planchet. The99Tc in each sample was separated and measured again by inductively coupled plasma mass spectrometry (ICP-MS). Tc was continuously removed from each sample with 2M HNO3 and 2M NaOH. After the solution containing Tc was adjusted to 0.1M HNO3, Tc was extracted on a novel extraction chromatographic resin to separate it from Ru. The total recoveries for Tc on the planchet samples were almost the same with an average of 91%. The results of99Tc measurements by both radiation and non-radiation counting methods agreed well with each other.


Stainless Steel HNO3 Inductively Couple Plasma Mass Spectrometry Environmental Sample Radiation Source 
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Copyright information

© Akadémiai Kiadó 1998

Authors and Affiliations

  • K. Tagami
    • 1
  • S. Uchida
    • 1
  • M. García-León
    • 2
  1. 1.Environmental and Toxicological Sciences Research GroupNational Institute of Radiological SciencesIbarakiJapan
  2. 2.Faculty of PhysicsUniversity of SevillaSevillaSpain

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