Stripping voltammetric detection of thorium on the oxine modified carbon paste electrode
- 125 Downloads
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.
- 2.Li Ju-Nan, Yi Fen-Yun, Jiang Zhong-Min, Fei Jun-Jie (2003) Microchim Acta 143:278–292Google Scholar
- 6.Yao XR, Zhou JX, Li CF (1984) Fenxi Huaxue 12:671Google Scholar
- 7.Li JN, Zhao ZF (1984) Fenxi Huaxue 12:347–353Google Scholar
- 9.Yi FY, Li JN, Zhu YW, Fei JJ (2001) Yankuang Ceshi 20:105–108Google Scholar
- 10.Zhang J, Li JN, Deng PH (2000) Chin J Anal Chem 28:476–479Google Scholar