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Design and characterization of flow-through coulometric cells with porous working electrodes made of crushed vitreous carbon

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Summary

Three types of flow-through, three-electrode cells with porous working electrodes made of crushed vitreous carbon were tested. The electrochemical properties of the cells were studied by hydrodynamic and cyclic voltammetry using potassium ferrocyanide test solutions. Depending on the volume of the porous working electrode, Nernstian behaviour and electrochemical yields up to 100% were observed for flow rates 1 to 7 ml/min. In the stopped-flow regime the cells exhibit thin-layer cell properties. The utility of the cells is demonstrated for on-line coulometric detection, continuous removal of impurities and dissolved oxygen and for anodic stripping coulometry of trace copper.

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Authors and Affiliations

  1. Laboratorium für Reinststoffanalytik, Max-Planck-Institut für Metallforschung, Bunsen-Kirchhoff-Strasse 13, W-4600, Dortmund 1, Federal Republic of Germany

    E. Beinrohr, P. Tschöpel & G. Tölg

  2. Department of Analytical Chemistry, Slovak Technical University, CS-812 37, Bratislava, Czechoslovakia

    M. Németh

Authors
  1. E. Beinrohr
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  2. M. Németh
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  3. P. Tschöpel
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  4. G. Tölg
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On leave from: Department of Analytical Chemistry, Slovak Technical University, CS-812 37 Bratislava, Czechoslovakia

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Beinrohr, E., Németh, M., Tschöpel, P. et al. Design and characterization of flow-through coulometric cells with porous working electrodes made of crushed vitreous carbon. Fresenius J Anal Chem 343, 566–575 (1992). https://doi.org/10.1007/BF00324817

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  • DOI: https://doi.org/10.1007/BF00324817

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