ETERMINATIO OF URANIUM IN ng LEVEL BY DIFFERENTIAL PULSE STRIPPING VOLTAMMETRY——DIRECT MEASUREMENT OP URANIUM IN NATURE WATER

Differential pulse stripping voltammetry (DPSV) has been developed to detect trace uranium.With supporting electrolyte HAc-NaAc (pH 4) and in the presence of cupferron (3×10-3-1×10-2‰) , a peak of uranium enriched on the hanging mercury drop electrode found (EF -1.1V vs.Ag/AgCl electrode) . The detection lim(?)t is 0.05ng/ml. The calibration curve is linear over the range 0.16-6.6ng/ml. Uranium in nature water has alo been measured directly in this work.