Using the sorption method for separation of dissolved acids and their salts in the systems composed of two liquid phases, to address the problems of sample preparation in analysis

Abstract

The results of studies are presented for testing a new approach to the Acid Retardation method in
which the separation of electrolyte mixtures is realized in columns with anion-exchanging bed filled with
organic liquid immiscible with water and aqueous solutions. Results of separation of model solutions
containing nitric acid and its salts, as well as of real solution of the digestion of bone tissue, on the anion
exchanger AV-17 in the nitrate form show the proposed approach to be promising for sample preparation
in chemical analysis. In particular, it can be used for efficient reduce of the acidity of solutions after
decomposition of hardly decomposed materials. The proposed approach is tested on the reproducibility of
results by analyzing the break-through curves of macro-components of the bone decomposition solution
in repeated sorption and desorption experiments