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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. E.3 DETERMINATION OF IRON-55E.3.1 Principle of AnalysesThis procedure is to determine the Fe-55 content in the presence of Fe-59 in water or solid samples. Iron isotopes Fe-55 and Fe-59 are separated from fission and corrosion products by ion exchange and organic extraction. The organic phase is then transferred into a counting vial containing toluene base scintillator cocktail. The sample is counted with a liquid scintillation detector. E.3.2 Separation and Purification Procedures
Fe carrier (10.0 mg/mL) Co, Cs, Mn, Cr hold-back carrier (~10 mg/mL) HCl—concentrated, IN, 6N, 9N NaOH—IN and 3N NH4OH—concentrated Anion resin—AG 1×10 50–100 mesh in chloride form Bis(2-ethylhexyl) Hydrogen Phosphate Toluene Buffer solution—pH 2.2
Analytical Ash-free filter pulp Isopropyl ether Liquid scintillation cocktail (POPOP solution)
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