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  • 1 Slovak Technical University Department of Environmental Chemistry and Technology Bratislava Czechoslovakia
  • | 2 Agricultural Cooperative “Future” Diviaky nad Nitricou Czechoslovakia
  • | 3 Slovak Technical University Central Laboratory of Chemical Techniques Bratislava Czechoslovakia
  • | 4 Institute of Nuclear Physics Tirana Albania
  • | 5 Tirana University Faculty of Natural Sciences Tirana Albania
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Trace amounts of progesterone were determined by sub- and super-equivalence isotope dilution analysis in model solutions and cow's milk. The samples were labelled with 11--hemi-succinate-/125I/-iodotyrosine methylesther progesterone and the separation of antibody-bound from free hormone was performed by adsorption on carbosorb. RIA-test-PROG M kit /SSR/ was used for reference analysis. The method is suitable for pregnancy testing.