Results 151 to 160 of about 22,563,925 (190)
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Journal of Radioanalytical and Nuclear Chemistry, 2003
A rapid separation for carrier-free 90Y in the aqueous phase of the water/nitrobenzene extraction system from an 90Y/90Sr generator was proposed. After two-stage extraction separation, chemical yield of 90Y in the final aqueous phase was roughly 80%, while 90Sr radionuclide impurity in this phase containing carrier-free 90Y was 10-6%.
P. Vaňura, E. Makrlík, V. Vobecký;
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A rapid separation for carrier-free 90Y in the aqueous phase of the water/nitrobenzene extraction system from an 90Y/90Sr generator was proposed. After two-stage extraction separation, chemical yield of 90Y in the final aqueous phase was roughly 80%, while 90Sr radionuclide impurity in this phase containing carrier-free 90Y was 10-6%.
P. Vaňura, E. Makrlík, V. Vobecký;
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Extraction separation of barium from strontium in a two-phase water-nitrobenzene system
Journal of Radioanalytical and Nuclear Chemistry Letters, 1985A rapid extraction separation of Ba2+ from Sr2+ with a nitrobenzene solution of sodium dicarbollylcobaltate /NaDCC/ in the presence of polyethylene glycol having mean relative molecular weight 400 /PEG 400/ and tetrasodium salt of trans-cyclohexane-1,2-diamine-N,N,N′,N′-tetraacetic acid /Na4L/ was developed.
E. Makrlík, P. Vaňura
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Journal of Radioanalytical and Nuclear Chemistry, 2005
A rapid separation of Sr2+from Ca2+using HCl, 15-crown-5 (15C5) and hydrogen dicarbollylcobaltate (H+B-) in the two-phase water-nitrobenzene extraction system was developed.
P. Vaňura, E. Makrlík
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A rapid separation of Sr2+from Ca2+using HCl, 15-crown-5 (15C5) and hydrogen dicarbollylcobaltate (H+B-) in the two-phase water-nitrobenzene extraction system was developed.
P. Vaňura, E. Makrlík
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The Journal of Physical Chemistry B, 2002
Nonlinear behavior of ionic surfactant (SDS) molecules at a water/nitrobenzene (W/NB) interface in a chemical oscillation system was investigated by monitoring interfacial tension (Δγ) using time-resolved quasi-elastic laser scattering (QELS). Simultaneous measurement of electrical potential (ΔV) allowed extraction and discussion of the time course of ...
Tetsuya Takahashi +2 more
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Nonlinear behavior of ionic surfactant (SDS) molecules at a water/nitrobenzene (W/NB) interface in a chemical oscillation system was investigated by monitoring interfacial tension (Δγ) using time-resolved quasi-elastic laser scattering (QELS). Simultaneous measurement of electrical potential (ΔV) allowed extraction and discussion of the time course of ...
Tetsuya Takahashi +2 more
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Journal of Electroanalytical Chemistry, 1983
Abstract The association of the caesium ion, Cs+, with the tetraphenylborate anion, TPB−, in a nitrobenzene medium was studied by two independent methods: the radiometric extraction method and the method of cyclic voltammetry at the interface of two immiscible electrolyte solutions (ITIES). Both methods permit the association constant of the reaction
Emanuel Makrlík, Le Quoc Hung
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Abstract The association of the caesium ion, Cs+, with the tetraphenylborate anion, TPB−, in a nitrobenzene medium was studied by two independent methods: the radiometric extraction method and the method of cyclic voltammetry at the interface of two immiscible electrolyte solutions (ITIES). Both methods permit the association constant of the reaction
Emanuel Makrlík, Le Quoc Hung
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Journal of Radioanalytical and Nuclear Chemistry, 2007
A rapid extraction separation of microamounts of Sr2+ from Y3+ using HCl, benzo-15-crown-5 (B15C5) and hydrogen dicarbollylcobaltate (H+B-) in the two-phase water-nitrobenzene system was developed. The reached separation factor α(Sr/Y) was higher than 105.
E. Makrlík, P. Vaňura
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A rapid extraction separation of microamounts of Sr2+ from Y3+ using HCl, benzo-15-crown-5 (B15C5) and hydrogen dicarbollylcobaltate (H+B-) in the two-phase water-nitrobenzene system was developed. The reached separation factor α(Sr/Y) was higher than 105.
E. Makrlík, P. Vaňura
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Collection of Czechoslovak Chemical Communications, 1990
General relations among thermodynamic parameters characterizing dissociation equilibria with species H2A, HA- and A2- (H2A is a symbol for an electroneutral undissociated acid) in a two-phase extraction system have been derived. From the extraction measurements, the equilibrium distribution constant of electroneutral bromophenol blue between the ...
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General relations among thermodynamic parameters characterizing dissociation equilibria with species H2A, HA- and A2- (H2A is a symbol for an electroneutral undissociated acid) in a two-phase extraction system have been derived. From the extraction measurements, the equilibrium distribution constant of electroneutral bromophenol blue between the ...
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Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1982
The transfer of the metal cation across the interface between two immiscible electrolyte solutions facilitated by complex formation with a ligand at the interface was investigated both theoretically and experimentally. The theory of single-scan voltammetry was derived which enables the complex stoichiometry (1:1, 1:2 or 1:3.
Daniel Homolka +2 more
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The transfer of the metal cation across the interface between two immiscible electrolyte solutions facilitated by complex formation with a ligand at the interface was investigated both theoretically and experimentally. The theory of single-scan voltammetry was derived which enables the complex stoichiometry (1:1, 1:2 or 1:3.
Daniel Homolka +2 more
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J. Chem. Soc., Faraday Trans., 1995
An experimental set-up consisting of a hollow glass tube and a beaker has been used to form a water–nitrobenzene–water three-phase system in a beaker. This system, with surfactant dissolved in one of the two aqueous phases and picric acid in the organic phase generated electric pulses.
Kazuo Miyamura +3 more
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An experimental set-up consisting of a hollow glass tube and a beaker has been used to form a water–nitrobenzene–water three-phase system in a beaker. This system, with surfactant dissolved in one of the two aqueous phases and picric acid in the organic phase generated electric pulses.
Kazuo Miyamura +3 more
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Journal of Radioanalytical and Nuclear Chemistry, 2002
A rapid extraction of trace amounts of strontium from calcium with a nitrobenzene solution of sodium dicarbollylcobaltate (NaDCC) in the presence of 15-crown-5 and the tetrasodium salt of ethylenediamine-N,N,N",N"-tetra-acetic acid (Na4L) in the aqueous phase was developed. The separation factor a(Sr/Ca) was approximately 105.
P. Vaňura, E. Makrlík
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A rapid extraction of trace amounts of strontium from calcium with a nitrobenzene solution of sodium dicarbollylcobaltate (NaDCC) in the presence of 15-crown-5 and the tetrasodium salt of ethylenediamine-N,N,N",N"-tetra-acetic acid (Na4L) in the aqueous phase was developed. The separation factor a(Sr/Ca) was approximately 105.
P. Vaňura, E. Makrlík
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