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Anodic stripping coulometry with collection for absolute trace analysis of lead, using flow-through electrochemical cells with porous working electrodes

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  • Electrochemical Analysis
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Summary

Flow-through electrochemical cells with porous working electrodes made of crushed reticulated vitreous carbon and plated with mercury were used for absolute analysis of trace amounts of lead by anodic stripping coulometry with collection (ASCWC) in a flow system. The role of mercury coating, flow rate and pH were investigated. The coulombic content of the collection peak corresponded to the theoretical values calculated by Faraday's law in a concentration range from about 10−9 to 10−6 mol/l. The relative error and the relative standard deviation was +0.15% and 0.8%, respectively for 2×10−6 mol/l analyte concentration. The absolute detection limit (3 s) was 0.1 ng of Pb, the linear response range 7×104.

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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

  3. Institut für Spektrochemie und angewandte Spektroskopie, Bunsen-Kirchhoff-Straße 11, W-4600, Dortmund, Federal Republic of Germany

    G. Tölg

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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Additional information

One 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. Anodic stripping coulometry with collection for absolute trace analysis of lead, using flow-through electrochemical cells with porous working electrodes. Fresenius J Anal Chem 344, 93–99 (1992). https://doi.org/10.1007/BF00325121

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  • DOI: https://doi.org/10.1007/BF00325121

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