Abstract
Liquid-liquid extraction of some class b metals, silver(I), mercury(II), palladium(II) and cadmium(II) using thiacrown compound, 1,4,8,11-tetrathiacyclotetradecane(TTCT) and picrate(Pic-) was stoichiometrically examined. Silver(I) and mercury(II) are extracted into 1,2-dichloroethane as ion-pair compounds, [Ag(ttct)2]+Pic- and [Hg-(ttct)]2+Pic2-respectively. Palladium(II) is extracted into nitrobenzene as [Pd(ttct)]2+Pic2- or [Pd(ttct)2]2+Pic2- depending on the concentration ratio of TTCT to palladium(II). The extraction constants for silver(I) and mercury(II) and also the distribution coefficient of TTCT in various solvents were determined. The extraction behaviors of these class b metals including copper(I) were compared and discussed in connection with the composition and the conceivable conformation of their extracts.
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Sekido, E., Saito, K., Naganuma, Y. et al. Liquid-Liquid Extraction of Some Class b Metal Ions with Thiacrown Ether 1,4,8,11-Tetrathiacyclotetradecane. ANAL. SCI. 1, 363–368 (1985). https://doi.org/10.2116/analsci.1.363
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DOI: https://doi.org/10.2116/analsci.1.363