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Present potential of electrochemical methods for metal determinations in reference materials

Gegenwärtiges Potential elektrochemischer Methoden für Metallbestimmungen in Referenzmaterialien

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Summary

Based on high-pressure ashing, the potential to determine some trace metals (Zn, Cd, Pb, Cu, Ni, Co, Al, Tl, Cr, Fe) by anodic or cathodic stripping voltammetry in the square wave (SWV) and differential pulse modes (DPASV) is described. In comparison to the differential pulse mode, the square wave mode shows advantages for cathodic stripping and for zinc determination.

New developments by use of potentiometric stripping analysis (PSA) permit the determination of Pb and Cd in whole blood without sample pretreatment and Pb, Cd, and Cu in milk and milk powder with simple pretreatment.

Mercury film microelectrodes prepared by electrodeposition of Hg onto a carbon fiber were used for the rapid multicomponent trace determination of heavy metals in very small (5 μl) samples by voltammetry and potentiometry.

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Authors and Affiliations

  1. Institute of Applied Physical Chemistry, Nuclear Research Center Jülich (KFA), P.O. Box 1913, D-5170, Jülich, Federal Republic of Germany

    P. Ostapczuk, M. Stoeppler & H. W. Dürbeck

Authors
  1. P. Ostapczuk
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  2. M. Stoeppler
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  3. H. W. Dürbeck
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Ostapczuk, P., Stoeppler, M. & Dürbeck, H.W. Present potential of electrochemical methods for metal determinations in reference materials. Z. Anal. Chem. 332, 662–665 (1988). https://doi.org/10.1007/BF00472664

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  • DOI: https://doi.org/10.1007/BF00472664

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