METHODS AND OBJECTS OF CHEMICAL ANALYSIS ISSN title: "Metody i obʺekty himičeskogo analiza" An international journal devoted to all aspects of Analytical chemistry ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)
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Working up method photometric determination of the titanium(IV) with bis,(2,3,4,trihydroxyphenilazo),benzidine

Alieva R.A., Nazarova R.Z., Chyragov F.M.

On a basis of pyrogallol we had been synthesized highly sensitive reagent,bis,(2,3,4,trihydroxyphenylazo),benzidine (H6R) and the given reagent has been used in photometric determination of the titanium(IV). The complexformation of titanium(IV) with H6R is studied. It has been established that at pH 5, λmàõ=396 nm is formed intensively colored binary complex. Also has been studied the influence of the third component,cetyltrimethylammonium bromide on complexformation. It is established that the maximum exit of different liqand complex is observed at pÍ 2, λ=372 nm. Constants of stability of complexes, parities of reacting components in complex and intervals obeying Beer s law are calculated. The influence of foreign ions and masking substances on complexformation is studied. The working up method has been used in photometric determination of the titanium (IV) in standard sample.

Keywords: photometric determination of the titanium(IV), bis,(2,3,4,trihydroxyphenylazo),benzidine, the standard sample