Results 171 to 180 of about 19,652 (193)
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Journal of Radioanalytical and Nuclear Chemistry Articles, 1993
Various volatile products formed in the γ-radiolysis of water-nitrobenzene-carbon tetrachloride two phase systems have been identified using GC-MS and GC-FTIR systems. The conditions for the separation of the products are described in detail. It was found that product formation is dependent on the composition of the systems.
J. Kuruc, M. K. Sahoo
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Various volatile products formed in the γ-radiolysis of water-nitrobenzene-carbon tetrachloride two phase systems have been identified using GC-MS and GC-FTIR systems. The conditions for the separation of the products are described in detail. It was found that product formation is dependent on the composition of the systems.
J. Kuruc, M. K. Sahoo
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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, 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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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 Radioanalytical and Nuclear Chemistry Letters, 1992
The influence of nitrobenzene and chlorobenzene on the total radiation yield of chloride ions in the γ-irradiation of water-carbon tetrachloride two-phase systems has been determined. Nitrobenzene at small concentrations shows a pronounced protective influence on the radiation destruction of carbon tetrachloride.
J. Kuruc, A. Hlatká
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The influence of nitrobenzene and chlorobenzene on the total radiation yield of chloride ions in the γ-irradiation of water-carbon tetrachloride two-phase systems has been determined. Nitrobenzene at small concentrations shows a pronounced protective influence on the radiation destruction of carbon tetrachloride.
J. Kuruc, A. Hlatká
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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 the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1983
Free energies of solution of 1 : 1 electrolytes in nitrobenzen have been obtained from solubility measurements. Free energies of transfer for these electrolytes from water to nitrobenzene were obtained by combining their free energies of solution in the organic solvent and in water.
Angela F. Danil de Namor +2 more
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Free energies of solution of 1 : 1 electrolytes in nitrobenzen have been obtained from solubility measurements. Free energies of transfer for these electrolytes from water to nitrobenzene were obtained by combining their free energies of solution in the organic solvent and in water.
Angela F. Danil de Namor +2 more
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Collection of Czechoslovak Chemical Communications, 1990
General relations among thermodynamic parameters characterizing chemical equilibria with species I-, I3-, I5-, and I2 in the two-phase water-nitrobenzene extraction system have been derived. Furthermore, these relations have been used for calculating equilibrium constants K1aq(I3-) and K2aq(I5-) corresponding to homogeneous reactions I-(aq) + I2(aq ...
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General relations among thermodynamic parameters characterizing chemical equilibria with species I-, I3-, I5-, and I2 in the two-phase water-nitrobenzene extraction system have been derived. Furthermore, these relations have been used for calculating equilibrium constants K1aq(I3-) and K2aq(I5-) corresponding to homogeneous reactions I-(aq) + I2(aq ...
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Collection of Czechoslovak Chemical Communications, 1984
The stability constants for the ML+ complex species, where M+ is an alkali metal cation and L is dibenzo-18-crown-6, in nitrobenzene saturated with water were calculated by employing published equilibrium data. The stability is found to increase in the cation order Li+ < Cs+ < Rb+ < K+ < Na+.
Emanuel Makrlík +2 more
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The stability constants for the ML+ complex species, where M+ is an alkali metal cation and L is dibenzo-18-crown-6, in nitrobenzene saturated with water were calculated by employing published equilibrium data. The stability is found to increase in the cation order Li+ < Cs+ < Rb+ < K+ < Na+.
Emanuel Makrlík +2 more
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Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1983
Abstract The transfer of Cs + and TMA + (tetramethylammonium) cations across the water-nitrobenzene interface was studied by the cyclic voltammetry method in the temperature range 5–65°C. With the use of simple thermodynamic cycles, the changes of the enthalpy and entropy of individual transfer of several univalent cations (Li + , Na + , H + , K + ,
Emanuel Makrlík, Le Quoc Hung
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Abstract The transfer of Cs + and TMA + (tetramethylammonium) cations across the water-nitrobenzene interface was studied by the cyclic voltammetry method in the temperature range 5–65°C. With the use of simple thermodynamic cycles, the changes of the enthalpy and entropy of individual transfer of several univalent cations (Li + , Na + , H + , K + ,
Emanuel Makrlík, Le Quoc Hung
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