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1.
Summary Extraction of microamounts of yttrium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of benzo-15-crown-5 (B15C5,L) has been investigated. The equilibrium data have been explained assuming that
the complexes HL+, HL, YL3+, YL and YH-1L are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated
with water have been determined. 相似文献
2.
Extraction distribution of microamounts of strontium in the water-CsCl-15-crown-5 (15C5,L)-nitrobenzene-cesium dicarbollylcobaltate system has been investigated. The equilibrium data have been explained assuming that the CsL+, CsL2
+ and SrL2
2+ complexes are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. 相似文献
3.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2006,269(1):209-211
Summary Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of Slovafol 909 (L) has been investigated. The equilibrium data have been explained assuming that the complexes
HL+, HL, CaL2+ and CaL are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene
saturated with water have been determined. 相似文献
4.
Summary From extraction experiments andg-activity measurements, the extraction constant corresponding to the equilibrium Pb2+(aq)+SrL(nb)?PbL(nb)+Sr2+(aq)taking place in the two-phase water-nitrobenzene system (L = benzo-15-crown-5; aq = aqueous phase, nb = nitrobenzene phase)
was evaluated aslog Kex(Pb2+,SrL)=0.1±0.1. Further, the stability constant of the benzo-15-crown-5-lead complex in nitrobenzene saturated with water was
calculated for a temperature of25 °C:log bnb(PbL)=13.2±0.1. 相似文献
5.
Z. Valentová P. Vaňura E. Makrlík 《Journal of Radioanalytical and Nuclear Chemistry》2006,267(2):471-475
Summary Extraction of microamounts of strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of dicyclohexyl-18-crown-6 (DCH18C6, L) has been investigated. The equilibrium data have been explained
assuming that the complexes HL+, HL, SrL2+and SrL are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene
saturated with water have been determined. 相似文献
6.
E. Makrlík P. Vaňura P. Selucký V. Kašička 《Journal of Radioanalytical and Nuclear Chemistry》2010,283(1):95-100
Extraction of microamounts of calcium and strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of 2,3-naphtho-15-crown-5 (N15C5, L) has been investigated. The equilibrium data have been explained assuming
that the complexes HL+, HL2
+, CaL2+, CaL2
2+ and SrL2
2+ are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated
with water have been determined. It has been found that in water saturated nitrobenzene the stability constant of the SrL2
2+ cationic complex species is substantially higher than that of the complex CaL2
2+. 相似文献
7.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2008,275(2):285-289
Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dibenzo-21-crown-7 (DB21C7) and dibenzo-24-crown-8 (DB24C8) has been investigated. The equilibrium data
have been explained assuming that the complexes HL+, CaL2+, CaL22+ and CaHL23+ (L = DB21C7, DB24C8) are extracted into the organic phase. The values of extraction and stability constants of the species
in nitrobenzene saturated with water have been determined. 相似文献
8.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2006,268(1):151-153
Summary Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of polyethylene glycol ligand PEG 400 (L) has been investigated. The equilibrium data have been explained
assuming that the complexes HL+and CsL+are extracted into the organic phase. The extraction and stability constants of the species in nitrobenzene saturated with
water have been determined. 相似文献
9.
E. Makrlík P. Vaňura P. Selucký J. Hálová 《Journal of Radioanalytical and Nuclear Chemistry》2007,274(3):625-629
Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−1) in the presence of benzo-18-crown-6 (B18C6, L) has been investigated. The equilibrium data been explained assuming that
the complexes HL+, ML2+, ML22+ and MHL23+ (M2+ = Sr2+, Ba2+) are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated
with water have been determined. 相似文献
10.
Summary Extraction of microamounts of barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of dibenzo-18-crown-6 (DB18C6, L) has been investigated. The equilibrium data have been explained assuming
that the complexes HL+, BaL2+, BaL, BaHL3+and BaHL are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene
saturated with water have been determined. 相似文献
11.
P. Vaňura E. Makrlík M. Vobecký 《Journal of Radioanalytical and Nuclear Chemistry》2003,256(3):599-602
Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of 12-crown-4 (12C4,L) has been investigated. The equilibrium data have been explained assuming that the complexes HL+, HL2
+, CaL2+ and CaL2
2+ are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. 相似文献
12.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2008,277(3):549-554
Extraction of microamounts of calcium, strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dibenzo-18-crown-6 (DB18C6, L) has been investigated. The equilibrium data have been explained assuming
that the complexes HL+, ML2+, ML22+ and MHL23+ (M2+ = Ca2+, Sr2+, Ba2+) are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated
with water have been determined. 相似文献
13.
Summary From extraction experiments andg-activity measurements, the extraction constant corresponding to the 2Na+(aq)+SrL(nb)?2NaL+(nb)+Sr2+(aq) equilibrium taking place in the two-phase water-nitrobenzene system (L=benzo-15-crown-5; aq=aqueous phase, nb=nitrobenzene
phase) was evaluated as log Kex(2Na+,SrL)=1.0±0.1. Further, the stability constant of the benzo-15-crown-5-sodium complex in nitrobenzene saturated with water
was calculated for a temperature of 25 °C: log bnb(NaL+)=7.8±0.1. 相似文献
14.
A rapid extraction separation of trace amounts of yttrium from strontium with a nitrobenzene solution of sodium dicarbollylcobaltate (NaDCC) and 18-crown-6 in the presence of tetrasodium salt of ethylenediamine-N,N,N",N"- tetraacetic acid (Na4L) in the aqueous phase was developed. The separation factor a(Sr/Y) was substantially higher than 106. This water-nitrobenzene extraction system can be applied for efficient separation of carrier-free 90Y from 90Sr/90Y generator. 相似文献
15.
P. Vaňura E. Makrlík Z. Valentová 《Journal of Radioanalytical and Nuclear Chemistry》2002,253(1):157-159
The extraction of cesium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of Slovafol 909 (p-nonylphenylnonaethylene glycol, L) has been investigated. The equilibrium data have been explained assuming that the complexes HL+, HL2
+, CsL+ and CsL2
+ are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. 相似文献
16.
Extraction of microamounts of barium by a nitrobenzene solution of cesium dicarbollylcobaltate (Cs+B-) in the presence of 15-crown-5 (15C5,L) has been investigated. The equilibrium data have been explained assuming that the complexes CsL+, CsL2
+ and BaL2
2+ are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. 相似文献
17.
E. Makrlík 《Journal of Radioanalytical and Nuclear Chemistry》2002,253(2):327-329
Extraction of microamounts of barium by a nitrobenzene solution of ammonium dicarbollylcobaltate (NH4
+B-) in the presence of 15-crown-5(15C5,L) has been investigated. The equilibrium data have been explained assuming that the complexes NH4L+, NH4L2
+ and BaL2
2+ are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. 相似文献
18.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2009,279(1):137-142
Extraction of microamounts of europium and americium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of diphenyl-N-butylcarbamoylmethyl phosphine oxide (DPBCMPO, L) has been investigated. The equilibrium data
have been explained assuming that the complexes HL+, HL2+, ML23+, ML33+ and ML43+ (M3+ = Eu3+, Am3+) are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated
with water have been determined. It has been found that the stability constants of the corresponding complexes EuL
n
3+ and AmL
n
3+, where n = 2, 3, 4 and L is DPBCMPO, in water saturated nitrobenzene are comparable. 相似文献
19.
From several cesium distribution experiments with 134 Cs tracer, the exchange extraction constant corresponding to the equilibrium Ag+ (aq)+CsL+ (nb)AgL+ (nb)+Cs+ (aq) in the two-phase water-nitrobenzene system (L = 18-crown-6; aq = aqueous phase, nb = nitrobenzene phase) was determined as log K
ex (Ag+ ,CsL+ ) = -0.6±0.1. Furthermore, the stability constant of the silver — 18-crown-6 complex in nitrobenzene saturated with water was evaluated for a temperature of 25 °C: log nb (AgL+ ) = 8.2±0.1. Finally, the individual extraction constant of the species AgL+ in the water-nitrobenzene system corresponding to the equilibrium AgL+ (aq)AgL+ (nb) was calculated: K
AgL+
= O1.2±0.1. 相似文献
20.
P. Vaňura E. Makrlík M. Vobecký; 《Journal of Radioanalytical and Nuclear Chemistry》2003,257(2):437-440
Extraction of microamounts of strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of 12-crown-4 (12C4,L) has been investigated. The equilibrium data have been explained assuming that the complexes HL+, HL2
+, SrL2+ and SrL2
+2- are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined. 相似文献