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Analytical and Bioanalytical Chemistry

, Volume 374, Issue 6, pp 1155–1158 | Cite as

Carbon paste electrodes modified with Bi2O3 as sensors for the determination of Cd and Pb

  • Rasa Pauliukaite
  • Radovan Metelka
  • Ivan Švancara
  • Agnieszka Królicka
  • Andrzej Bobrowski
  • Karel Vytřas
  • Eugenijus Norkus
  • Kurt Kalcher
Original Paper

Abstract.

Carbon paste electrodes bulk-modified with Bi2O3 were used for the determination of Cd(II) and Pb(II). The best composition was 1% (wt%) Bi2O3 in the paste. The measurements were made by differential pulse voltammetry in the potential range from –1.2 V to –0.3 V. The peak potential of the reoxidation of Cd is –0.85 V, and of Pb –0.60 V vs. SCE. The lowest concentration that could be determined was 5 µg L–1 of both metals (preconcentration time 240 s), the relative standard deviation was 3.5%–5.0% (four determinations). The correlation coefficient (r2) of the calibration curves was 0.9966 (for Cd) and 0.9971 (for Pb). The Bi2O3-modified electrode could be used for the analysis of drinking water, mineral water and urine.

Modified carbon paste electrode Bi2O3 Stripping voltammetry Cadmium Lead 

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Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • Rasa Pauliukaite
    • 1
  • Radovan Metelka
    • 2
  • Ivan Švancara
    • 2
  • Agnieszka Królicka
    • 3
  • Andrzej Bobrowski
    • 3
  • Karel Vytřas
    • 2
  • Eugenijus Norkus
    • 4
  • Kurt Kalcher
    • 1
  1. 1.Institute of Chemistry, Analytical Chemistry, Karl-Franzens University, 8010 Graz, Austria
  2. 2.Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic
  3. 3.Department of Building Materials, Faculty of Materials Engineering and Ceramics, University of Mining and Metallurgy, 30–059 Krakow, Poland
  4. 4.Institute of Chemistry, Department of Kinetics and Catalysis, 2600 Vilnius, Lithuania

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