Catalytic spectrophotometric determination of Mo(VI) in water samples using 4-amino-3-hydroxy-naphthalene sulfonic acid
Abstract
In the present work, a sensitive, and simple kinetic method was developed for the determination of trace amounts of Mo(VI) based on its catalytic effect on the oxidation of 4-Amino-3-hydroxy-naphthalenesulfonic acid (AHNA) with H2O2.
To optimize the parameters affecting the aforementioned system, the reaction was followed spectrophotometrically by tracing the oxidized product at 475 nm.
The absorption of the solution in the presence and absence of the molybdenum ion in different conditions was compared.
he optimum reaction conditions were: 9 mmol L−1 AHNA, 35 mmol L−1 H2O2, 27 mmol L−1 acetate buffer with pH = 5.3 at temperature 40 °C for 30 min.