Determination of Mo(VI)–Zr(IV) interaction parameters in highly acidic solutions by UV absorbance spectrophotometry Original Research Article

Molybdenum(VI)–zirconium(IV) systems were studied by UV spectrophotometry in 0.5–3 M HClO4 media, revealing the existence of a complex between the two species. Within the experimental domain (2 M≤[HClO4]≤3 M, [Mo(VI)]<10−2 M, [Zr(IV)]<10−2 M) a complex with 1:1 stoichiometry is formed with a conditional constant of approximately 200 at 25°C.