Extraction of sodium picrate into nitrobenzene in the presence of dicyclohexyl-18-crown-6

被引：8
|
作者：
Makrlik, E [2 ]
Vanura, P
机构：
[1] Prague Inst Chem Technol, CR-16628 Prague, Czech Republic
[2] Charles Univ, Fac Educ, Prague 11639 1, Czech Republic
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 1997年 / 223卷 / 1-2期
关键词：
D O I：
10.1007/BF02223391
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
From extraction experiments and gamma-activity measurements, the extraction constant corresponding to the equilibrium Na+(aq) + A(-)(aq)+ L(nb)reversible arrow NaL+(nb) + A(-)(nb) taking place in the two-phase water-nitrobenzene system (A(-) = picrate, L = dicyclohexyl-18-crown-6; aq = aqueous phase, nb = nitrobenzene phase) was evaluated as log K-ex(NaL+, A) = 2.6. Further, the stability constant of the dicyclohexyl-18-crown-6-sodium complex in nitrobenzene saturated with water was calculated: log beta(nb)(NaL+) = 7.8.
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页码：229 / 231
页数：3
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