共查询到20条相似文献,搜索用时 531 毫秒
1.
Z. Valentová P. Vaňura E. Makrlík 《Journal of Radioanalytical and Nuclear Chemistry》1997,224(1-2):45-48
Extraction of85Sr by a nitrobenzene solution of bis-1,2-dicarbollylcobaltate in the presence of 15-crown-5 (15C5, L) has been investigated. The equilibrium data and the typical maxima concerning the dependencies of the Sr distribution ratios on the analytical concentration of 15C5 in the system under study can be explained assuming that the HL+, HL2
+ and SrL2
2+ species are extracted into the nitrobenzene phase. The values of the corresponding extraction and stability constants of the extracted species in nitrobenzene saturated with water have been determined. 相似文献
2.
P. Vaňura 《Journal of Radioanalytical and Nuclear Chemistry》1999,241(3):493-497
Extraction of calcium by a nitrobenzene solution of bis-1,2-dicarbollylcobaltate in the presence of 15-crown-5 (15C5, L) has
been investigated. The equilibrium data and the typical maxima concerning the dependence of the Ca distribution ratios on
the analytical concentration of 15C5 in the system under study can be explained assuming that the HL+, HL2
+ and CaL2+, CaL2
2+ particles are extracted into the nitrobenzene phase. The values of the corresponding extraction and stability constants of
the extracted species in nitrobenzene saturated with water have been determined and the mutual Sr/Ca separation has been discussed 相似文献
3.
P. Vaňura E. Makrlík Z. Valentová 《Journal of Radioanalytical and Nuclear Chemistry》1999,241(3):457-460
Extraction of microamounts of cesium by the nitrobenzene solution of H+ bis-1,2-dicarbollylcobaltate (H+B−) in the presence of 15-crown-5 (15C5, L) has been investigated. The equilibrium data have been explained assuming the complexes
HL+, HL2
+, CsL+ and CsL2
+ to be 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 Extraction of microamounts of yttrium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of 15-crown-5 (15C5,L) has been investigated. The equilibrium data have been explained assuming that the
complexes HL+, HL2,+, YL3+, YL2,3+and YH-1L2,2+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
5.
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
6.
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
7.
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
8.
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
9.
Summary Extraction of microamounts of barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of 15-crown-5 (15C5, L) has been investigated. The equilibrium data have been explained assuming that the
complexes HL+, HL and BaL 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.
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
11.
P. Vaňura V. Jedináková-Křížová 《Journal of Radioanalytical and Nuclear Chemistry》2004,260(3):679-681
The equilibrium data and the typical maxima concerning the dependences of the Sr distribution ratios on the analytical concentration
of p-nonylphenylnonaethylene glycol in the system under study can be explained assuming that the HL+, HL2
+, SrL2+ and SrL2
2+ particles are extracted into the nitrobenzene phase. The values of the corresponding extraction and stability constants of
the extracted species in nitrobenzene saturated with water have been determined. The possibility of the use of this system
for the determination of nonionic surfactants by the method of concentration dependence of strontium is discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
12.
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
13.
Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dibenzo-24-crown-8 (DB24C8, L) has been investigated. The equilibrium data have been explained assuming
that the species HL+, HL2
+, ML2+, ML2
2+ and MHL2
3+ (M2+ = Sr2+, Ba2+) are extracted into the organic phase. The values of extraction and stability constants of the complexes in nitrobenzene
saturated with water have been determined. It was found that the stability constants of the cationic complex species BaL2+ and BaL2
2+ in the considered nitrobenzene medium are somewhat higher than those of the corresponding complexes SrL2+ and SrL2
2+. 相似文献
14.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2010,284(1):137-142
Extraction of microamounts of strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B?) in the presence of dibenzo-24-crown-8 (DB24C8, L) has been investigated. The equilibrium data have been explained assuming that the species HL+, HL2 +, ML2+, ML2 2+ and MHL2 3+ (M2+ = Sr2+, Ba2+) are extracted into the organic phase. The values of extraction and stability constants of the complexes in nitrobenzene saturated with water have been determined. It was found that the stability constants of the cationic complex species BaL2+ and BaL2 2+ in the considered nitrobenzene medium are somewhat higher than those of the corresponding complexes SrL2+ and SrL2 2+. 相似文献
15.
The extraction of microamounts of cesium by a nitrobenzene solution of sodium bis-1,2-dicarbollylcobaltate (Na+B−) in the presence of 15-crown-5 (15C5, L) has been investigated. The equilibrium data have been explained assuming the complexes
NaL+, NaL2
+, CsL+ and CsL2
+ to be 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 strontium and barium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dibenzo-21-crown-7 (DB21C7, L) has been investigated. The equilibrium data have 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
17.
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
18.
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
19.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2006,268(1):167-169
Summary Extraction distribution of microamounts of calcium in the water-HCl-nitrobenzene-benzo-15-crown-5 (L)-hydrogen dicarbollylcobaltate
(H+B-) system 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
20.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2008,275(2):309-312
Extraction of microamounts of europium and americium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of dibutyl diethylcarbamoylmethylene phosphonate (DBDECMP, L) has been investigated. The equilibrium data
have been explained assuming that the complexes HL+, HL22+ 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. 相似文献