Use of sensitized fluorescence of europium in solutions of phosphoric acid for the determination of the uranium concentration

Journal Article · Mon Jul 01 04:00:00 EDT 1985 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6015622

Nikitina, S A; Stepanov, A V

The authors study the conditions of transmission of energy of excitation from UO/sup 2 +//sub 2/ to Eu/sup 3 +/ in solutions of phosphoric acid. They determine rate constants of quenching k /SUB q/ and transmission of energy of excitation from uranyl to europium k/sub 2/. They find that the values of k /SUB q/ and k/sub 2/, as well as the intensity ratios of the transitions /sup 5/D/sub 0/-/sup 7/F/sub 2/ and /sup 5/D/sub 0/-/sup 7/F/sub 2/ in the spectrum of Eu/sup 3 +/, do not depend on the uranium concentration. This, they argue, suggests that the transmission of energy of excitation from uranyl to europium does not involve the formation of mixed polynuclear complexes containing europium and uranium. They demonstrate the possibility of determining uranium in solution, using sensitized fluorescence of europium.

• OSTI ID: 6015622
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 26:6; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
COMPLEXES
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EUROPIUM COMPOUNDS
EXCITATION
FLUORESCENCE
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LUMINESCENCE
OXIDES
OXYGEN COMPOUNDS
PHOSPHORIC ACID
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
QUENCHING
RARE EARTH COMPOUNDS
URANIUM COMPLEXES
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
URANYL COMPLEXES
URANYL COMPOUNDS