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Rapid 90Sr/90Y determination in water samples using a sequential injection method

Mateos1, Gomez, Garcias

  • 1Departament de Fisica, Universitat de les Illes Balcars, Palma de Mallorca, Spain.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|July 6, 2000
PubMed
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A new semiautomatic method efficiently separates Strontium-90/Yttrium-90 (90Sr/90Y) in under 30 minutes. This technique accurately determines 90Sr/90Y in various water samples, even with high salt content.

Area of Science:

  • Analytical Chemistry
  • Radiochemistry
  • Environmental Science

Background:

  • Accurate determination of Strontium-90/Yttrium-90 (90Sr/90Y) is crucial for environmental monitoring.
  • Existing radiochemical separation methods can be time-consuming and complex.

Purpose of the Study:

  • To develop a rapid, semiautomatic radiochemical separation method for 90Sr/90Y.
  • To validate the method's efficiency and accuracy in diverse water matrices.

Main Methods:

  • Sequential injection analysis utilizing a manganese dioxide (MnO2)-impregnated filter for selective 90Y adsorption.
  • Radiochemical separation achieved in approximately 30 minutes.
  • Determination of beta-activity and calculation of initial isotope concentrations using Bateman equations.

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Main Results:

  • High radiochemical yield of (90 +/- 10)% for 90Sr/90Y separation.
  • Method demonstrated effectiveness in mineral and thermal waters with up to 3500 mg/l salt concentration, maintaining yields >80%.
  • Insignificant interference from common ions found in water samples.

Conclusions:

  • The developed semiautomatic sequential injection method offers a fast and reliable approach for 90Sr/90Y determination.
  • This method is suitable for analyzing 90Sr/90Y in various environmental water samples, including those with high salinity.
  • The procedure provides accurate results with high radiochemical yields, simplifying routine analysis.