Stripping voltammetric detection of thorium on the oxine modified carbon paste electrode
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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 × 10−9–2.2 × 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.
KeywordsThorium Oxine complex Carbon paste electrode Stripping voltammetry
The support of this work by research grants from the NSTRI and Shahrekord University Research Council is gratefully acknowledged.
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