The interaction of Ti(IV) with 4-(2',3',4'-trihydroxyphenyl)-2-nitro-1-sulfoazobenzene (H₃L) in the presence and in the absence of cationic surfactants (CAS) (cetylpyridinium chloride (CPCl), cetylpyridinium bromide (CPBr), cetyltrimethylammonium bromide (CTMABr)) was studied. The interval of concentration obeying Beer's law is established. In the complex formation of titanium(IV), the dependence A = f(C) is expressed by linear equations. The effect of time and temperature has been studied. The stability constants of binary and mixed-ligand titanium(IV) complexes were calculated. The ratio of the reacting components in the binary complex is 1:2, and in the mixed ligand 1:2:2. The effect of foreign ions and masking substances on the complex formation of titanium(IV) with reagents has been studied. Alkaline, alkaline earth and some transitional elements practically do not interfere to the determination. A technique has been developed for the spectrophotometric determination of titanium(IV) in aluminum-based standard samples

doi.org/10.32737/0005-2531-2022-4-15-20