Extraction of Sr(II), Ag(I) and Pb(II) by some oxa-tia- and tia-crown ethersстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Liquid-liquid extraction of several cations by some oxa-tia- and tia- crown ethers was studied. Sr(II), Pb(II) and Ag(I) were taken as hard, borderline and soft Lewis acids, respectively. Trace amounts of 210Pb, 90Sr and 110(m)Ag were used as chemical yield monitors. The results were explained by the Pearson theory. Some of the examined compounds posses high affinity towards Ag(I) and Pb(II) extraction. The distribution coefficient for Ag(I) reached the value of 140.