Stripping voltammetry of silver(I) with a carbon-paste electrode modified with thiacrown compounds.
The accumulation behaviour and stripping voltammetry of silver(I) was investigated with a carbon-paste electrode modified with a thiacrown compound. Silver could be accumulated at the electrode in the absence of an applied potential by immersing the electrode in a solution of sodium perchlorate containing silver(I), then reduced at constant potential in 0.1M acetate buffer solution. Finally a well-defined stripping peak could be obtained by scanning the potential in a positive direction. The calibration curve for silver was linear over the range 0.5-2.5 muM with accumulation for 5 min. Studies of the effect of other metal ions showed that the silver was selectively accumulated at the electrode.
Tanaka
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Department of Chemistry, Faculty of Science, Hokkaido University, Nishi-8, Kita-10, Kita-ku, Sapporo-shi, Hokkaido, Japan.
Yoshida
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