Stripping chronopotentiometry at scanned deposition potential (SSCP). part 4. The kinetic current regime

H.P. van Leeuwen, R.M. Town

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44 Citations (Scopus)

Abstract

The theory for depletive stripping chronopotentiometry at scanned deposition potential (SSCP) has been extended to include the case of kinetic currents. Invoking the Koutecky-Koryta approximation, i.e., assuming a spatially discontinuous transition from labile to non-labile behaviour, allows a rigorous expression to be obtained for the full SSCP wave. Theoretical predictions are supported by experimental data for the quasi-labile Cd-NTA system at a conventional HMDE and a mercury microelectrode. The characteristic features of the SSCP wave for systems influenced by homogeneous kinetics allow dynamic speciation characteristics to be unambiguously identified and discriminated from those due to irreversibility in the electrochemical reaction or heterogeneity in the chemical speciation.
Original languageEnglish
Pages (from-to)67-74
JournalJournal of Electroanalytical Chemistry
Volume561
Issue number1-2
DOIs
Publication statusPublished - 2004

Keywords

  • fundamental features
  • speciation analysis
  • electrode processes
  • polarography
  • cadmium
  • parameters
  • reduction
  • complexes
  • mercury

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