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Determination of water by controlled-potential coulometry

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Summary

A new electroanalytical approach, utilizing controlled-potential coulometry, for the determination of water has been devised. The proposed method involves the coulometric measurement of iodide produced by the stoichiometric reaction of water with Karl Fischer reagent and shows promise of providing a selective means of water estimation without prior chemical calibration.

Zusammenfassung

Zur Bestimmung von Wasser wird die Coulometrie bei kontrolliertem Potential vorgeschlagen. Das beschriebene Verfahren beruht auf der coulometrischen Bestimmung des Jodids, das bei der Reaktion von Wasser mit Karl-Fischer-Reagens entsteht. Die Methode ermöglicht eine selektive Wasserbestimmung ohne vorhergehende chemische Eichung.

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References

  1. Meyer, A. S., and C. M. Boyd: Analyt. Chemistry 31, 215 (1959); cf. Z. analyt. Chem. 172, 203 (1960).

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  2. Mitchell, J., and D. M. Smith: Aquametry. New York: Intersci. Publ. 1948.

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  3. Swensen, R. F., and D. A. Keyworth: Analyt. Chemistry 35, 863 (1963); cf. Z. analyt. Chem. 203, 144 (1964).

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Authors and Affiliations

  1. Department of Chemistry, University of Pennsylvania, Philadelphia, Pa., USA

    G. A. Rechnitz & K. Srinvasan

Authors
  1. G. A. Rechnitz
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  2. K. Srinvasan
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Rechnitz, G.A., Srinvasan, K. Determination of water by controlled-potential coulometry. Z. Anal. Chem. 210, 9–12 (1965). https://doi.org/10.1007/BF00515690

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  • DOI: https://doi.org/10.1007/BF00515690

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