Voronych O. Formation, extraction and analytical application of some ion-pairs of Tungsten(VI) and Rhenium(VII) with cyanines dyes.

The thesis is dedicated to investigation of formation conditions, extraction and analytical use of ionic pairs of Ві(ІІІ) with halogenic ions and cyanide dyes. Complex formation of Ві(ІІІ) with halogenic ions and styrilic basic dyes at presence of some surface-active substances havt been studied, and the optimum conditions fof the formation have been found. Influence of nature and concentration of the surface-active substances on spectrophotometric properties of the ionic pairs were investigated. For the first time the methods to carry out the complex formation and extraction of the oinic pairs from water-organic media using cyanine dyes and bromide-ions have been proposed for bismuth. The high effectiveness of the methods is stated by using jf theoretical investigations and reinforced by the patent. The highly reliable extraction-photometric methods have been developed for determination of bismuth in semiconductor materials and alloys.