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Trace analysis of germanium

Part 2. Polarographic behaviour and determination by adsorptive stripping voltammetry

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  • Trace Analyses
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Summary

The dp-polarographic and stripping voltammetric behaviour of germanium(IV) in the presence of various supporting electrolytes is discussed. Moreover, a highly sensitive adsorptive stripping voltammetric technique has been developed. The determination is based on the accumulation of germanium(IV)-diol complexes by adsorption at a hanging mercury drop electrode, followed by cathodic stripping voltammetry. Suitable for the complex forming reaction are catechol (1,2-dihydroxybenzol) and pyrogallol (1,2,3-trihydroxybenzol). By using pyrogallol the detection limit is 0.1 ng ml−1 with a standard deviation of ±13%. A multistage combined procedure with adsorptive stripping voltammetry is described for the determination of germanium traces in ginseng and garlic. The results are compared with those using extraction-spectrophotometry and atomic absorption spectrometry.

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Authors and Affiliations

  1. Department of Inorganic and Analytical Chemistry, University of Trier, P. O. Box 3825, D-5500, Trier, Federal Republic of Germany

    Christine Schleich & Günter Henze

Authors
  1. Christine Schleich
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  2. Günter Henze
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Dedicated to Prof. Dr. G. Schulze on the occasion of his 60th birthday

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Schleich, C., Henze, G. Trace analysis of germanium. Fresenius J Anal Chem 338, 145–148 (1990). https://doi.org/10.1007/BF00321877

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  • DOI: https://doi.org/10.1007/BF00321877

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