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Application of the Karl Fischer method to the determination of the moisture content in insulating papers

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Summary

A modified extraction method has been developed for the determination of the moisture content of insulating papers used in condensers and transformers. The water is extracted from the paper sample with methanol continuously titrated with Karl Fischer reagent by means of the special apparatus devised. The method can advantageously be used to measure the adsorption isotherms of paper samples containing 0.05–2 % water.

Zusammenfassung

Eine modifizierte Extraktionsmethode für die Feuchtigkeitsbestimmung in Isolierpapier, wie es für Kondensatoren und Transformatoren verwendet wird, wurde ausgearbeitet. Das Wasser wird aus der Papierprobe mit Methanol extrahiert, das kontinuierlich mit Karl Fischer-Reagens in einer speziellen Apparatur titriert wird. Das Verfahren kann vorteilhaft zur Messung der Adsorptionsisothermen von Papierproben mit einem Wassergehalt von 0,05–2% verwendet werden.

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References

  1. A. Csernátony-Hoffer, IEEE Transactions on Electrical Insulation, Vol. EI-3, No. 4. 1968.

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  4. E. Eberius, Wasserbestimmung mit Karl Fischer-Lösung, Weinheim/ Bergstr.: Verlag Chemie. 1958.

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Authors and Affiliations

  1. Institute for General and Analytical Chemistry, Technical University, Budapest

    O. Gimesi, T. Cserfalvi & E. Pungor

Authors
  1. O. Gimesi
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  2. T. Cserfalvi
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  3. E. Pungor
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Gimesi, O., Cserfalvi, T. & Pungor, E. Application of the Karl Fischer method to the determination of the moisture content in insulating papers. Mikrochim Acta 61, 373–379 (1973). https://doi.org/10.1007/BF01218168

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  • DOI: https://doi.org/10.1007/BF01218168

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