Stripping voltammetric detection of thorium on the oxine modified carbon paste electrode

摘要

Thorium cannot be determined by direct polarography or conventional stripping voltammetry. Higher sensitivity has been achieved by square wave anodic stripping voltammetry of the thorium complex with oxine at a carbon paste electrode. In the pH at 1.0 the peak current of the complex was linearly dependent upon the concentration of Th(IV) within the range of 2.0 x 10(-9) - 2.2 x 10(-8) M, with the limit of detection 0.2 nM, the accumulation time, and the accumulation potential were 200 s and -0.6 V, respectively.