THORIUM DETERMINATION BY THE ADSORPTIVE V OLTAMETER METHOD WITH SHIPPING IN THE T-BLACK ERYCHROMIUM

A method of thorium determination in the presence of eriochrom black T (EBT) by;adsorptive stripping voltammeter was proposed: The adsorptio n of thorium complexes with EBT on a hanging mercury drop electrode in neutral media was studied. The composition of the complexes of thoriu m with;r EBT was determined as well as the kinetics and adsorption par ameters. In 0.0 mol KnO(3) (pH 7.20, borax buffer) the current-thorium concentration dependence in the presence of EBT is liniar within the interval of 2.10(-8) - 4.10(-7) mol. (1(-1))(t(acum.) = 60 s) The meth od was applied to the determination of thorium in natural waters.