"Electrocatalysis And Amperometric Detection At A Ruthenium-modified Indium-hexacyanoferrate Film Electrode"
Electroanalysis
1998 Volume 10, Issue 17 Pages 1163-1167
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Tommaso R.I. Cataldi, Giuseppe E. De Benedetto, Alfonso Bianchini
Abstract:
The electrocatalytic activity of a glassy carbon electrode modified with electrochemically deposited indium(III)-hexacyanoferrate (InHCF) film, which was subsequently cycled in a solution of Ru(III), is described. Although the resulting Ru-modified InHCF thin film electrode behaves in a manner analogous to the parent InHCF film, its stability was improved. Such a modified electrode was characterized, in acidic (pH 2) 0.5 M KCl solutions, by cyclic voltammetry, and FIA. It exhibits a high catalytic activity for the electrooxidation of some inorganic and organic compounds of anal. interest, such as As(III), S2O32-, cysteine, and 2-furaldehyde. The anal. applicability of this novel ruthenium-modified InHCF film electrode for the amperometric detection in flowing streams is discussed. Repetitive sample injections with amperometric detection of S2O32- at +0.8 V (vs. Ag/AgCl) as applied potential produced a stable response over 8 h of operation, making it very attractive for practical applications.
Arsenic(3+)
Sulfite
Cysteine
2-Furaldehyde
Apparatus
Detector
