extraction

The equilibrium parameters of the extraction of iodine from aqueous model solutions of various compositions have been determined and the infl uence of the background mineralization of the raffi nate has been revealed. The eff ect of the isooctane/tributylphosphate (TBP) ratio on the extraction of iodine from aqueous solutions with diff erent ionic strengths has been determined by the isomolar series method. The hypothetical composition of hydrate-solvate complexes has been established both experimentally and using computer modeling tools.

The relevance of this study is due to the need to develop methods for the extraction and quantitative determination of higher carboxylic acids in fi sh. In this work, we propose a simple, inexpensive, and highly sensitive extraction-photometric technique for the selective determination of the total content of fatty acids.

The comparison and assessment of the efficiency of using the precipitation of sparingly soluble metal hydroxides and fluorides for the extraction and pre-concentration of samarium isotopes from the solution simulating acidic leachate of the soil were made. It was shown that the precipitation of samarium isotopes was achieved quantitatively at the pH of about 7 and the co-precipitation of alkaline and alkaline earth elements did not exceed 20%.