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  • 1 Water Research Institute Bratislava Czechoslovakia
  • | 2 Slovak Technical University Department of Environmental Chemistry and Technology Bratislava Czechoslovakia
  • | 3 Slovak Academy of Sciences Institute of Physics Bratislava Czechoslovakia
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Sub- and super-equivalence method of isotope dilution analysis /variant CCV/ was applied for the determination of trace of strontium in radioactive solutions in the presence of about 1000-times larger amount of calcium. DC-18-C-6 crown ether was used as a selective reagent. Picrate anion was chosen as a complementary ion.