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Fast, selective and sensitive methods for the determination of lead-210 in phosphogypsum and phosphate ore

  • J. R. W. Woittiez
  • J. E. Sloof
  • K. J. Kroon
Application of Radioanalytical Techniques to Nuclear Safeguards and the Measurement of Environmental Radioactivity

Abstract

Two methods are presented for a fast, accurate and precise determination of210Pb in industrial samples with a calcium-phosphate and-sulphate matrix. One method combinessolid-liquid extraction on a Pb-selective column “Sr*Spec” (Eichrom) with gamma-ray spectrometry of210Pb and can be applied to samples >10 g for aselective210Pb determination. The yield is determined gravimetrically. The detection limit is 380 mBq for a 24 h counting period. The other method combineschromatography on Sr*Spec with liquid scintillation counting of210Pb for asensitive210Pb determination and can be applied to samples of up to 1 g. The yield is determined on-line by the UV signal of PbEDTA. The detection limit is 70 mBq for a 2 h counting period. Aspects of accuracy, precision, selectivity, sensitivity and the application of both methods to phosphogypsum and phosphate ores are presented.

Keywords

Phosphate Physical Chemistry Inorganic Chemistry Detection Limit Liquid Scintillation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • J. R. W. Woittiez
    • 2
  • J. E. Sloof
    • 3
  • K. J. Kroon
    • 1
  1. 1.Interfaculty Reactor InstituteDelft University of TechnologyDelftThe Netherlands
  2. 2.Netherlands Energy Research FoundationPettenThe Netherlands
  3. 3.DirkshornThe Netherlands

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