ADSORPTIVE STRIPPING VOLTAMMETRIC STUDY OF SCANDIUM–ALIZARIN COMPLEXAN COMPLEX AT A CARBON PASTE ELECTRODE

Authors:
  • JLJunan Li
    Junan Li
  • FYFenyun Yi
    Fenyun Yi
  • DSDongsheng Shen
    Dongsheng Shen
  • JFJunjie Fei
    Junjie Fei
Publisher website
Google Scholar
Abstract
A highly selective, sensitive, rapid and economic adsorptive stripping voltammetric method has been developed for the determination of ultra trace amount of scandium at a carbon paste electrode (CPE) in the current paper. The Sc(III)−alizarin complexan (ALC) complex is adsorbed at the electrode in a mixed buffer solution (pH 5.4) containing 0.04 M acetate and 0.016 M biphthalate, yielding one peak corresponding to the reduction of ALC in the complex at −0.60 V (vs. SCE). The second-order derivative linear scan voltammograms of the complex are recorded by use of model JP−303 polarographic analyzer from −0.10 to −1.10 V. A linear relationship between the second order derivative peak current and Sc(III) concentration in the range of 1.0 × 10−9 to 6.0 × 10−7 M is observed. The detection limit for Sc(III) is 6.0 × 10−10 M. A relative standard deviation of 4.34% is given for ten determinations of 6.0 × 10−8 M Sc(III). The method has been applied to the determination of the trace Sc(III) in the mineral ...