Radiochemical studies on the solvent extraction of inorganic ions with dodecylbenzenesulfonic acid, (2). Inorganic extraction studies on the system dodecylbenzenesulfonic acid-hydrochloric acid

A radiochemical study on the extraction behavior of about sixty chemical elements was performed in 3%DBSA, 1:1 diethyl ether ethyl acetate mixture, and hydrochloric acid solution system. The distribution ratios between organic and aqueous phases were determined in the acidity range 0.01 to 2.0 N hydrochloric acid. The characteristics of the acid dependence curves mentioned in the previous paper, viz. (a) DBSA extraction gives different K_d values depending on the valency of the inorganic cation to be extracted; (b) DBSA is of no use for anion extraction; (c) K_d values in DBSA extraction are not so high or so low that determination of K_d values is easy; were definitely confirmed in this study. In addition, the similarity between DBSA extraction and cation exchange was clarified. The usefulness of DBSA extraction in indicating the valency or ionic charge of inorganic cations in aqueous solution, was clearly ascertained. (author)