Author:
Vaňura Petr,Benešová Marie,Makrlík Emanuel,Kyrš Miroslav,Rais Jiří
Abstract
Extraction of microamounts of 152, 154 Eu from the aqueous solutions of perchloric acid (c(HClO4) = 0.1-0.5 mol l-1) was studied in the presence of 3 . 10-4 -0.3 mol l-1 of polyethylene glycol PEG 400 (L) by the nitrobenzene solutions of Co(III)-dicarbolide (3.3'-commo-bis(undecahydro-1,2-dicarba-3-cobalta-closo-dodecarborate) (-1), {(π-(3)-1,2-B9C2H11)2Co}-, henceforth only B-) of the concentration c(dicarbolide) = 10-3-10-1 mol l-1. Maxima of the Eu distribution ratio dependence on the concentration of polyethylene glycol are explained by the competition reactions between the positively charged europium complexes (EuL3+, EuLH-12+, and EuL23+, EuL2H-22+, or EuL33+) and protonized polyethylene glycol (HL+) in the organic phase. The respective equilibrium extraction constants were determined.
Publisher
Institute of Organic Chemistry & Biochemistry
Cited by
16 articles.
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