Electrochemical investigation of Mo(VI)-MTB-ClO3- system in phosphate buffer

Abstract

The reduction mechanism of molybdenum-methyl thymol blue (MTB)-chlorate system has been investigated in water on a mercury electrode. As this system is very sensitive for ultra-trace determination of molybdenum, the actual mechanism involved was studied. Electrochemical techniques, including dc fast polarography and cyclic voltammetry were employed. It is shown that, the cathodic wave of molybdenum in the presence of methyl thymol blue and chlorate has an adsorptive catalytic character.